意識Mind-consciousness
心王八識之第六。三能變中之了境能變（第三能變）之主——前五識為了境能變之表層五官分支，意識為其深度延展、認知總綰。依意根（即第七末那識，→#7）而起，緣法境（一切法皆其所緣）。三性、三量、三境皆通；五十一心所全相應——八識中相應心所最廣者，造業之主處。
漢zh · Xuanzang 譯
心王八識之第六。三能變中之了境能變（第三能變）之主——前五識為了境能變之表層五官分支，意識為其深度延展、認知總綰。依意根（即第七末那識，→#7）而起，緣法境（一切法皆其所緣）。三性、三量、三境皆通；五十一心所全相應——八識中相應心所最廣者，造業之主處。
經
[共傳] 《雜阿含經》卷十三六入處段（T2n0099）（按：此處引文乃《雜阿含》於意根性質之經典定式，為意識所依之基礎）：
意是內入處，非色，不可見，無對。
——意根（manas）與前五色根之根本差異：意根非色法——眼耳鼻舌身根皆為淨色根，居於器官；意根則無色，無方所，無質礙。意識依此非色之意根而起，故所緣亦廣於色境之範圍。
[大乘] 《解深密經》卷一·心意識相品（玄奘譯，T16n0676，T16.0692c）：
此中有識，眼及色為緣，生眼識；與眼識俱隨行，同時、同境，有分別意識轉。
——大乘明示意識之雙重身分：與五識俱起者為五俱意識（隨眼識同時同境而轉，→#1-#5 已詳此架構運作）；離五識獨起者為獨頭意識（夢中、定中、散位、推理皆其場域）。意識為前五識之釋義者（同步補出語言概念之構作），亦為獨思者（離五識而能憶念、推理、想像、做夢）。
論
《成唯識論》卷五（前六轉識三性，T31n1585，T31.0028a）：
此六轉識，何性攝耶？謂善、不善、俱非性攝。
《八識規矩補註》（T45n1865）第六識體性頌：
三性三量通三境，三界輪時易可知。
第六識相應頌：
相應心所五十一，善惡臨時別配之。
性界受三恆轉易，根隨信等總相連。
動身發語獨為最，引滿能招業力牽。
——意識之認知架構三軸開放、心所總攝、業力獨主：
| 軸 | 意識所通 |
|---|---|
| 三性 | 善、不善、無記皆通 |
| 三量 | 現量、比量、非量皆通 |
| 三境 | 性境、帶質境、獨影境皆通 |
| 心所 | 五十一全相應（→#9-#59 全列）—— 八識中唯一全攝者 |
| 造業 | 「動身發語獨為最」——前五識無分別不能造業；末那（→#7）恆執我但不直接動身發語；阿賴耶（→#8）無覆無記不造業；唯意識起善惡心、發動身語意三業之力 |
「審而非恆」——八識之恆／審四句分判（《成唯識論》卷六）：
| 識 | 恆 | 審 | 解 |
|---|---|---|---|
| 前五識（→#1-#5） | 非恆 | 非審 | 緣具則生，緣缺則滅；不深推度 |
| 第六意識（本條） | 非恆 | 審 | 能深細推度，但有間斷（五位暫滅，下詳） |
| 第七末那（→#7） | 恆 | 審 | 恆執我相，深細思量 |
| 第八阿賴耶（→#8） | 恆 | 非審 | 持種不斷，無深推度 |
意識之獨特位置即「審而非恆」——能深推但會間斷，此架構結構直接導向五位無識之教義（下詳於梵段偈 16）。
諸緣
意識五緣方生——較前五識大幅精簡（鼻舌身最少亦需七緣，→#3-#5）：
| 緣 | 義 |
|---|---|
| 1. 根 | 意根（即第七末那識，→#7）—— 意識之不共依（同時為「染淨依」之攝合） |
| 2. 境 | 法境（一切法皆其所緣，含過現未、有為無為、實境心境） |
| 3. 作意 | 遍行心所（→#9）—— 警心趣境 |
| 4. 種子 | 意識自種子（第八識所持，現行所熏） |
| 5. 根本依 | 第八阿賴耶識（→#8）—— 種子所藏 |
意識不需「空、明、分別依、染淨依」——意識本身即「分別」之識（無需另立分別依），不依五色根（無空、明），且其染淨依即根（末那既為意根，染淨依角色攝合入根）。所需緣大幅簡化，然所緣最廣（一切法）。諸緣遞減鏈：眼 9 → 耳 8 → 鼻舌身 7 → 第六意識 5 → 末那 4 → 阿賴耶 4。
⭐ 意識五位無識：意識所緣雖廣，然有五位暫滅：(一)無想果（生於無想天，āsaṃjñika）、(二) 無想定（asaṃjñi-samāpatti）、(三) 滅盡定（nirodha-samāpatti，→#76）、(四) 極重睡眠（gāḍha-middha）、(五) 極重悶絕（mūrcchanā）—— 此五位中六識暫滅而生命不斷、我感不絕（《成唯識論》卷五；《唯識三十頌》偈 16，下詳於梵段）。此五位之缺口正為唯識立第七、第八識之比量根據：六識間斷時何能持續執我與生命相續？答：第七末那（恆執我）、第八阿賴耶（持種相續）。
至佛位
意識轉為妙觀察智（pratyavekṣaṇā-jñāna）——《成唯識論》卷十（T31n1585，T31.0056b）：「善觀諸法自相共相，無礙而轉。」「審」之功能性形式不變，「所審」之趣向轉——轉依前之深細推度為造業之 audax，轉依後即為說法、演教、回應有情之 audax；同一識位之同一功能，前者造業，後者教法。前五識之成所作智為佛之感官之介，意識之妙觀察智為佛之認知智用——二者於佛鋪陳共構教化之架構單位。
按：四層引文呈意識義之架構縱深 —— 阿含立意根為非色之內入處（為意識之形上學前提）；解深密經立五俱／獨頭之雙重身分（為意識之功能性縱深）；唯識論於心法層立通三性三量三境、相應 51 心所、動身發語之主、「審而非恆」之獨特位置；諸緣段以五緣方生 + 五位無識並陳。意識為前五識之增廣（補出名言概念於每一現量刹那）兼前五識之代行（離五識而能獨立運作於記憶、推理、想像）。八識中功能最廣，亦最具認知深度。
梵saṃskṛta
mano-vijñāna < manas（意，意根）+ vijñāna（識，→#1 已詳）。
manas < √man「思、量、念」+ -as（中性後綴）—— 字義「思量者、能思之器」。
⭐ 印歐祖語同源網絡：√man < 印歐祖語 *men-「思、念」—— 印歐心識詞彙之核心根，於諸主要語支皆有強反映：
| 同源 | 義 |
|---|---|
| 拉丁 mēns / mentis | 心、智、思 |
| 希臘 menos (μένος) | 精神、意志、思力 |
| 英文 mind | < OE gemynd < PGmc *ga-mundiz |
| 英文 mental, mention, monument, memorial | < 印歐祖語 *men- / *mnā- 同根延伸 |
| 古教會斯拉夫 miněti | 思、想 |
| 立陶宛 miñti | 念、想 |
⭐ 梵 manas 與英文 mind 為直接印歐祖語同源——意之名本身即「能思之根」。漢譯「意」字從心從音（音為思之動），與梵 manas 之義相通。
⭐ 三 dharmas 同根之 √man 詞族（百法範圍內印歐祖語同源豐富之跨法詞族）：
| Dharma | 構造 | 義 |
|---|---|---|
| manas- (意根 / 第六識本身, 本條 + →#7) | √man + -as | 思量者 |
| manas-kāra (作意 →#9) | √man + -as + √kṛ + 後綴 | 思量之作起 |
| māna (慢 →#33) | √man + -a | 思量我之高擡 |
——三 dharma 跨心王／心所之兩類；同印歐祖語 *men- 之根於唯識心識架構中分節為認知官能（意根）/ 認知喚起（作意）/ 我相昇高（慢）三展用。
⭐⭐ 重要術語分判：唯識學中 manas 一字有二義：
| 義 | 所指 |
|---|---|
| manas as faculty (indriya) | 意根 = 第七末那識（→#7），意識之所依 |
| mano-vijñāna | 意識本身（本條 #6），第六識 |
二者皆出 manas 之根，但於唯識精細區別：意根（官能）與意識（consciousness）不同識（在阿毘達磨集論之單識架構中亦不分離；唯識立七識之創新即在此分節）。安慧於《三十頌釋》（[Tvbh_62]）以 nairukta-vidhi（詞源學方法，承自 Yāska《尼祿多》）衍生末那之名為「mananātmaka」（具思量自性者）—— 詞源學作為教義論證。
⚠ In Review · 《阿毘達磨集論》（Abhidharma-samuccaya）梵本無獨立之 mano-vijñāna 定義段 —— 《集論》之識蘊定義以 vijānana（了別）總覆八識；意識之個別教義分佈於《唯識三十頌》偈 8bc（了境能變共式）、偈 9（51 心所相應）、偈 16（五位無識），及《成唯識論》卷五–七。
⭐ 《唯識三十頌》偈 9 （51 心所相應之梵文根據；世親 Triṃśikā-vijñaptikārikā）：
sarvatragair viniyataiḥ kuśalaiś caitasair asau ǀ saṃprayuktā tathā kleśair upakleśais trivedanā ǁ
「[第六意識] 與遍行（sarvatraga，5 →#9-#13）、別境（viniyata，5 →#14-#18）、善（kuśala，11 →#19-#29）諸心所相應，亦與煩惱（kleśa，6 →#30-#35）、隨煩惱（upakleśa，20 →#36-#55）相應；通三受（tri-vedanā，→#11 苦樂捨三）。」
——此偈為意識「相應心所五十一」之梵文直接根據；《成唯識論》之心所運作教義即此偈之展開。
⭐⭐ 《唯識三十頌》偈 16（五位無識之梵文根本根據）：
manovijñānasaṃbhūtiḥ sarvadāsaṃjñikād ṛte ǀ samāpattidvayān middhān mūrcchanād apy acittakāt ǁ
「意識恆生，除以下五位外：(一) 無想果（āsaṃjñika）、(二)–(三) 二定（samāpatti-dvaya = asaṃjñi-samāpatti + nirodha-samāpatti）、(四) [深] 睡眠（middha）、(五) 悶絕（mūrcchanā）—— 此五位中皆無心（acittaka）。」
《成唯識論》卷五（T31n1585, T31.0028a）對偈 16 之逐語素仿譯：
第六意識除生無想天、無想滅盡二定、極重睡眠、極重悶絕，此五位中皆悉現起。
⭐ 此偈為唯識論證第七、第八識之必要性之直接經典根據：意識五位暫滅，而生命相續不斷、我感不絕——第七末那（恆審思量，→#7）與第八阿賴耶（持種相續，→#8）正是為填補此五位之缺口而立。「五位無識」教義為瑜伽行派自六識架構升級至八識架構之比量銜接；無此教義，七、八識之必要性即無立論根據。
按：意識之梵文教義以三偈為核心—— 偈 8bc（了境能變共式）+ 偈 9（51 心所相應）+ 偈 16（五位無識）—— 三偈構成意識教義之架構三聯。⭐ 詞源閃光：manas* / mind 為印歐祖語直接同源——東西文明之心識核心詞同一根；又 √man 三 dharma 詞族（意 / 作意 / 慢）於唯識架構中分節印歐祖語 *men- 之三展用，印歐祖語詞源學作為心識教義之闡明。要而言之：意根 vs 意識之術語分判（同根二義）為理解唯識七／八識架構之必要前提；若混同二義，則整套瑜伽行派心識論不可解。*
巴pāḷi
⚠ In Review · 重要部派分判：南傳 不立第七末那識——故 manas 於南傳中即指意識本身之內向面（即 mano-viññāṇa 之內向相），非獨立之第七識。北傳唯識細分意根（第七末那）與意識（第六），南傳則統攝於 mano-viññāṇa 一識之內部分判。此一差異為百法範圍內南北傳心識架構之最大架構分歧（→#7 之南北分歧較此更深；→#8 阿賴耶亦同）。
Pāli 對應：mano-viññāṇa。Skt → Pāli 之語音對應：manas → mano（梵巴皆作 mano- 於合成詞中）；vi-jñāna → vi-ññāṇa（jñ → ññ 標準對應）。
南傳論藏《阿毘達摩攝義論》（Abhidhammattha-saṅgaha）將 mano-viññāṇa 之範圍遠廣於唯識之第六識 —— 南傳之 89／121 citta 體系中，除前五識 vipāka-cittas 之外，所有非感官之心皆為 mano-viññāṇa-類（含 bhavaṅga、manodvārāvajjana、votthapana、javana、tadārammaṇa 等諸功能性位置）。
《相應部·六處相應》SN 35 系列諸經之意識生起公式：
Manañca paṭicca dhamme ca uppajjati mano-viññāṇaṃ.
緣意與法，生意識。
同公式亦見《大念處經》DN 22 法隨觀·六入處段、《中部》MN 148 Chachakkasutta。Pāli dhamma 為第六境——範圍廣於漢譯「法」字所暗示者：含一切心所、一切過去未來、一切概念性對象、涅槃自身亦為 dhamma。此於南北傳大致一致。
⭐⭐ 南北傳之深層對話：意識五位間斷所帶出之「生命相續者」問題，南傳以 bhavaṅga（有分心）作答——bhavaṅga 為「生命之基底因素」（bhava-aṅga，「有之分」），於深眠等無顯識之際仍無間持續，以護持生命相續、業緣相續、人格相續。Bhavaṅga 之功能於唯識架構中分配於第七末那（恆執我相）+ 第八阿賴耶（持種相續）二識——南傳以單識之深層面解此問題，北傳以另立二識解此問題。同一義理問題，二異路徑：
| 問題 | 南傳解 | 北傳唯識解 |
|---|---|---|
| 五位無識時，何者持續？ | bhavaṅga (有分心；mano-viññāṇa 之深層相續面) | 第七末那（→#7，恆執我） + 第八阿賴耶（→#8，持種） |
| 業力如何熏習相續？ | citta-santāna + bhavaṅga 之熏 | 第八阿賴耶之種子 |
| 我執之本體基礎？ | sakkāya-diṭṭhi + asmi-māna (以 javana 起念) | 第七末那之俱生我執（恆而不間） |
⭐ 此一對照為南北傳心識論值得深探之匯聚點——非二者誰對誰錯之問題，而是同一現象學 於系統分節時之兩種架構選擇。
按：意識為南北傳共傳之教義（mano-viññāṇa / 意識同名同實），唯範圍與架構不同——南傳意識涵蓋廣（含 bhavaṅga 等功能性位置），北傳意識範圍狹（僅指第六，第七末那、第八阿賴耶分立）。Pāli mano-viññāṇa 之廣範圍對唯識 mano-vijñāna 之狹範圍，乃同名異域之經典案例。Bhavaṅga* （生命之基底因素）與第七／八識之功能性對應為百法範圍內最深入的南北架構對話之一。*
漢綜述zh-synthesis
「意識」之梵文 mano-vijñāna 為兩段合成——manas（意／意根，< √man「思、量、念」+ -as 中性後綴）+ vijñāna（識，vi- + √jñā「知」+ -ana，→#1 已詳）。⭐ √man < 印歐祖語 *men-「思」，同源詞網絡跨印歐諸語：拉丁 mēns / mentis（心、智）、希臘 menos（精神、意志）、英文 mind（< OE gemynd）+ mental, mention, monument, memorial。梵 manas 與英文 mind 為直接印歐祖語同源——東西文明之心識核心詞共一動詞根、共「思」之語法手勢。⭐⭐ √man 之四法詞族（架構全圖詳 →#7）：manas（意根 / 末那識，本條 #6 + →#7）/ mano-vijñāna（意識，本條 #6）/ manas-kāra（作意，→#9）/ māna（慢，→#33）——四 dharma 跨心王（#6, #7）/ 心所（#9, #33）兩類；同印歐祖語 *men- 之根於唯識心識架構中分節為四展用（→#7 已詳此詞族架構之全貌；本條以指針參照，不重推四 dharma 表）。 術語雙義須釐清：manas 作官能（indriya）= 意根 = 第七末那識（→#7），意識之所依；mano-vijñāna = 第六識（本條）——同根、二識位、功能分立（→#7 已詳此分節）。
意識為次第三能變，差別有六之第六分位；依末那（→#7）為所依，了境為性相；遍緣諸法、通三量三境三性、與五十一心所全相應；獨主動身發語、引滿能招業力之識位。義理核心由《唯識三十頌》三偈構成——偈 8bc（了境能變共式，→#1 已詳）+ 偈 9（51 心所相應：sarvatragair viniyataiḥ kuśalaiś caitasair asau / saṃprayuktā tathā kleśair upakleśais trivedanā，51 心所全攝）+ 偈 16（五位無識，下詳）。意識為五十一心所全相應之識（八識心所相應數：意識 51 > 前五識 34 > 末那 18 > 阿賴耶 5；意識為其中全攝者）；亦為通三量三境三性者（三量、三境、三性於八識中之分布，意識三軸皆全開放）。「動身發語獨為最，引滿能招業力牽」——業力造作之主。「審而非恆」之分判（→論段恆審四句表）直接導向五位無識（偈 16）教義。
意識為南北傳共傳之教義（同名同實）；唯南傳 mano-viññāṇa 之涵蓋範圍廣（含 bhavaṅga 等功能性位置），北傳意識範圍狹（僅第六，第七末那、第八阿賴耶分立）。南傳 bhavaṅga（有分心）功能於唯識架構中分配於 →#7 末那 + →#8 阿賴耶二識——南北傳心識架構分歧之深處詳 →#7（南北最深分歧之一）。
意識為禪修訓練之主要場域——業力之主（動身發語唯意識）、概念標籤之源（五俱意識之同步分別判攝）、最終轉化為妙觀察智（pratyavekṣaṇā-jñāna）——善觀諸法自相共相，無礙而轉。《唯識三十頌》偈 16 之五位無識——(一) āsaṃjñika（無想果）、(二) 無想定、(三) 滅盡定（→#76）、(四) 極重睡眠、(五) 悶絕——五位中意識暫滅，為唯識論立第七、第八識之比量根據（五位無識時何者持續？→ 末那恆執我 + 阿賴耶持種相續）。⚠️ 五位無識為偈 16 之「意識五位暫滅」（第六識之間斷框架），有別於偈 7bcd 之「末那三位無有」（→#7 之末那暫斷框架）——兩框架識位不同、偈頌不同、間斷機制不同，絕不可混淆。
「意識」玄奘之既譯——「意」覆蓋 manas 之思量義，「識」< vijñāna；然「意識」漢文已涉第六意識之意與六根之意根二義，故第七識需音譯「末那」以避混（→#7 已詳此譯名決策）。英譯 Mind-consciousness 為通行譯（區別於 Manas 之第七識音譯）。
意識 ——次第三能變，差別有六之第六分位；依末那（→#7）為所依，了境為性相；遍緣諸法、通三量三境三性、與五十一心所全相應；獨主動身發語、引滿能招業力之識位。
英綜述en-synthesis
Sanskrit mano-vijñāna compounds manas (mind, mind-faculty) with vijñāna (discriminating awareness, see →#1). The Pāli mano-viññāṇa preserves the compound through standard sound shifts.
The Indo-European etymology is one of the strongest in the entire 100-dharma catalog. Manas derives from PIE *men- "to think," yielding a rich cognate set across the major branches: Latin mēns / mentis "mind, intellect" (with derivatives mental, mention); Greek menos "spirit, will, force of thought"; English mind (< Old English gemynd < Proto-Germanic *ga-mundiz); English monument, memorial (< PIE *mnā-, related root). Sanskrit manas and English mind are direct PIE cognates — the most central cognitive term in each language family descends from the same Proto-Indo-European root *men-. The conceptual core "the cognitive faculty" is preserved across five thousand years of linguistic divergence. The Buddhist analytical lexicon's name for the sixth consciousness is therefore not exotic vocabulary requiring translation; it is, etymologically, the same word as English mind.
The √man root opens onto a three-dharma cluster within the catalog: manas (mind, this entry and the seventh consciousness →#7), manas-kāra (attention, the cetasika →#9, "the making-active of mind"), and māna (conceit, the kleśa →#33, "the elevation of self in mind"). Three classifications, three doctrinal positions — but a single PIE root threading through them. The architecture preserves at the level of vocabulary what the doctrine teaches at the level of analysis: that mind is not one thing but a structured complex, and the structure is articulated by the same root deployed differently.
A critical terminological note: in Yogācāra, manas serves double duty. As the faculty (indriya) supporting the sixth consciousness, manas refers to the seventh consciousness (the kliṣṭa-manas, ego-mind, →#7). As the consciousness itself, mano-vijñāna is the sixth. The Yogācāra innovation is precisely this distinction — Theravāda packages both functions within mano-viññāṇa alone. To read Yogācāra without understanding this terminological split is to misread the entire seven/eight-consciousness architecture.
Mind-consciousness is the broadest in functional scope of the eight. Where the five sense-consciousnesses are confined to bare perception of their respective sense-objects, mind-consciousness penetrates all dharmas as possible object — past, future, present; conditioned and unconditioned; real, dependent-real, and shadow-only. It operates across an open three-axis matrix: three modes (wholesome / unwholesome / neutral, like the sense-consciousnesses); three measures (pratyakṣa perception, anumāna inference, and abhāva / non-veridical cognition — unique among the vijñānas); three object-types (vastu-objects, tadviṣaya dependent-real objects, and parikalpita shadow-only objects — also unique). And it is associated with the entire array of 51 mental factors — the only consciousness that can be fully populated by the whole psychological catalog (Triṃśikā 偈 9). The Abhidharma-samuccaya gives no per-識 definition; the foundational Sanskrit material lives in three Triṃśikā kārikās: 偈 8bc (the sixfold object-cognition frame), 偈 9 (the 51-cetasika association), and 偈 16 (the five-state suspension, treated below).
Two modes of operation. Mind-consciousness operates in two distinct modes that share a single underlying structure. Concomitant mind-consciousness (五俱意識) co-arises with each of the five sense-consciousnesses, travelling alongside, same-time, same-object (《解深密經》). When eye-consciousness sees red, mind-consciousness in the same moment supplies the recognition: that is a flower; it is beautiful; I want it. The two are functionally distinct but phenomenally fused — a fact this volume's #1 entry develops as the practitioner's seam of attentional training. Independent mind-consciousness (獨頭意識) operates without a sense-consciousness as companion: in dreams (夢中獨頭), in absorption (定中獨頭), in directed thought and recollection (散位獨頭), and in the rare states of internal disturbance (狂亂獨頭). It is the same consciousness in both modes; what changes is whether a sense-consciousness is its co-arising companion. The two-mode structure is what gives mind-consciousness its broad operational scope: it both supplements every act of sensory cognition and operates entirely on its own.
Investigating but not constant — the five-state suspension. Of the eight consciousnesses, only the sixth and the seventh "investigate" (審) — that is, deliberately discriminate and reach beyond bare presence. But unlike the seventh (which is constant), the sixth is not constant. Mind-consciousness is interrupted in five canonical states, named directly in Triṃśikā 偈 16: manovijñānasaṃbhūtiḥ sarvadāsaṃjñikād ṛte / samāpattidvayān middhān mūrcchanād apy acittakāt — "Mind-consciousness arises constantly except in the āsaṃjñika-state, the two attainments, deep sleep, and unconsciousness; these are 'no-mind' (acittaka)."
The five states:
- āsaṃjñika (無想果) — rebirth among the "unconscious deities," a realm in which the flow of consciousness is suspended for the length of a divine lifespan. Least obvious of the five and easiest to omit, but doctrinally critical.
- asaṃjñi-samāpatti (無想定) — the meditative attainment of "no-thought," entered deliberately by certain practitioners.
- nirodha-samāpatti (滅盡定, see →#76) — the meditative cessation of perception and feeling, accessible to anāgāmin and arhat practitioners.
- gāḍha-middha (極重睡眠) — deep sleep beyond the dreaming threshold.
- mūrcchanā (悶絕) — fainting, deep unconsciousness, coma.
⭐ This five-state interruption is the empirical foundation of the Yogācāra inferential argument for the seventh and eighth consciousnesses. If the sixth alone constituted the mind, what would carry life and self-sense across these gaps? The body persists through deep sleep; the person waking from a coma is still the same person; the meditator emerging from nirodha-samāpatti resumes their continuous identity. Some cognitive structure must persist across the gap — and per Yogācāra, the sixth consciousness explicitly does not. The Yogācāra answer: the seventh persists as constant ego-grasping; the eighth persists as the substrate of all storage. The five-state suspension is not a peripheral observation; it is the load-bearing wall of the eight-consciousness architecture.
Mind-consciousness is shared canon as a name (mano-viññāṇa / mano-vijñāna), with the Pāli formula manañca paṭicca dhamme ca uppajjati mano-viññāṇaṃ (SN 35, DN 22, MN 148) verbatim parallel to the Saṃyuktāgama statement that mind is "the inner sense-base, non-material, invisible, unobstructed." But the architecture differs at depth. Theravāda recognizes only six consciousnesses; manas in Theravāda denotes the introspective dimension of mano-viññāṇa itself, not a separate seventh consciousness. The Yogācāra split between sixth and seventh consciousness — between thinking-and-deciding and constant ego-grasping — is precisely the innovation that distinguishes Yogācāra's eight-consciousness model from the southern six-consciousness model.
⭐ The Theravāda alternative answer to the same question that Yogācāra resolves through 7th + 8th consciousness is bhavaṅga (有分心, "factor-of-existence"). Bhavaṅga is a stratum of mano-viññāṇa that runs continuously beneath the active stream of cognition — it persists during deep sleep, between waking moments, across the gaps where active thought ceases. It is what makes a person continuous, what carries karmic conditioning forward, what bridges the gaps that Yogācāra's manas and ālaya together bridge. Same problem, two architectural solutions: Theravāda compresses the answer into a single deeper layer of consciousness; Yogācāra distributes it across two distinct consciousnesses with separate structural functions. Neither tradition is "wrong"; they have made different systematic choices about how to model the same phenomenology. The encounter between bhavaṅga and manas/ālaya is one of the deepest cross-tradition dialogues in Buddhist psychology.
Mind-consciousness is the principal site of training — the consciousness on which most contemplative practice directly works. Three reasons. First, mind-consciousness alone is the source of karma in the doctrinal-technical sense. The first five consciousnesses, being "without conceptual construction," do not generate ethical valence on their own; the seventh, while constant, does not directly initiate bodily or verbal action; the eighth is "neutral and unobscured," neither wholesome nor unwholesome. Only mind-consciousness can initiate wholesome or unwholesome action, and the Eight-Consciousness Verses state this directly: 「動身發語獨為最，引滿能招業力牽」 — "in initiating bodily and verbal action, [mind-consciousness] alone is supreme; through projecting and consummating karma, it bears the karmic momentum." This is why a tradition so concerned with karmic cultivation focuses its training on the sixth. Second, mind-consciousness is where conceptual labeling, evaluation, and attachment-generation occur. The training to see clearly without conceptual overlay operates by stilling mind-consciousness's elaborative tendency — the entire vipassanā tradition operates here. Third, mind-consciousness is what investigates. The investigative power that is awakening's eventual transformation — pratyavekṣaṇā-jñāna, the wisdom of wondrous investigation — is mind-consciousness in transformed form. Practice does not bypass mind-consciousness; it refines and eventually transforms it.
Mind-consciousness — the discriminating cognition arising in dependence on the mind-faculty (the seventh consciousness, →#7) and apprehending all dharmas as object. The broadest in functional scope of the eight: penetrating all three modes (wholesome / unwholesome / neutral), all three measures (perception / inference / non-veridical cognition), and all three object-types (real / dependent-real / shadow). Associated with the entire array of fifty-one mental factors — the only consciousness fully populated by the psychological catalog. The principal site of karma-generation through bodily and verbal action. Investigating but not constant: interrupted in five canonical states (rebirth among the unconscious deities, the two no-thought attainments, deep sleep, and unconsciousness — Triṃśikā 偈 16).
譯translator's note
譯者按： 結構分析詳 S3-P05、S3-P02。意識（mano-vijñāna，#6）為心王架構之樞紐——前五識為其感官翼，第七末那為其我相官能，第八阿賴耶為其業力的基底；意識自身則為三量三境三性開放、51 心所全相應、業力獨主之總綰位置。⭐ 跨法詞源閃光：印歐祖語 *men- 之 √man 根於唯識架構中分節為四法：意識（#6）/ 末那（→#7）/ 作意（→#9）/ 慢（→#33）—— 百法範圍內印歐祖語同源豐富之跨法詞族；意識為其架構中心。⭐⭐ 《唯識三十頌》（Triṃśikā）偈 16 之五位無識為瑜伽行派自六識升級至八識架構之比量銜接——無此五位之義理證據，七／八識之必要性即無立論根據。