Two Hundred Sixty Characters
This is the session the first three were for. The Heart Sutra is 260 characters long, uses only 117 distinct ones, and eighty-nine percent of them sit in the canon's top four hundred. You are going to read all of it — every character, in order, to the last syllable of the mantra. Nothing will be summarized for you.
觀自在菩薩行深般若波羅蜜多時，
照見五蘊皆空，度一切苦厄。
When the Bodhisattva Who Contemplates Freely was practicing the deep perfection of wisdom, he saw clearly that the five aggregates are all empty, and he crossed beyond all suffering and distress.
Why this text
The Heart Sutra is the most recited text in East Asian Buddhism and the shortest complete sutra in the canon. It is also almost entirely built out of Session 3: 無 twenty-one times, 不 nine times, 空 seven times. If you can handle three negations and a handful of nouns, you can handle this.
We are reading Xuanzang's version, T0251, finished in 649. Note his opening: 觀自在菩薩, the Bodhisattva Who Contemplates Freely. Kumārajīva had rendered the same name 觀世音, Regarder of the World's Sounds — the form that became Guanyin. Same bodhisattva, two translators, two readings of the Sanskrit.
The openingOne of six
When the Bodhisattva Who Contemplates Freely was practicing the deep perfection of wisdom, he saw clearly that the five aggregates are all empty, and he crossed beyond all suffering and distress.
時 at the end of the first clause is Session 1's 一時 doing a different job: here it marks when something was happening, not once upon a time. Chinese has no tense, so a bare 時 carries the whole "while he was doing X" construction.
The 五蘊, five aggregates, are the inventory of a person: form, sensation, perception, volition, consciousness. They arrive as a set and come back twice more in this text, so learn them here.
Tap a character above.
Form and emptiness, four ways
Śāriputra! Form is not different from emptiness, emptiness is not different from form; form is precisely emptiness, emptiness is precisely form. Sensation, perception, volition, and consciousness are likewise the same.
Four clauses, and the move from the first pair to the second is the point. 不異 says not different from — a cautious, negative formulation. 即是 says is precisely — the positive identity, asserted flat out. The text says the weaker thing first and then the stronger, in both directions.
Then 亦復如是 — likewise the same — and the other four aggregates are folded in without repeating the argument. That formula occurs 8,143 times across 440 sutras; it is how scripture avoids saying everything four times.
Six negations in a row
Śāriputra! These dharmas are empty of characteristics: not arising, not ceasing; not defiled, not pure; not increasing, not decreasing.
Three pairs of opposites, each pair canceled with 不, because every one of these words is a verb. Arising and ceasing; defilement and purity; increase and decrease. The pairs are not random — they answer the three things one might still want to claim about something declared empty: that it began, that it is stained or clean, that it can grow.
諸 at the front is doing the plural: 諸法, the dharmas, all phenomena whatsoever. Chinese has no plural ending, so 諸 ranks ninth in the canon on that job alone.
Emptying the inventoryThe passage people find overwhelming, and the easiest in the sutra
Therefore, in emptiness there is no form, no sensation, perception, volition, or consciousness; no eye, ear, nose, tongue, body, or mind; no form, sound, scent, taste, touch, or dharma; no field of the eye, and so on up to no field of mind-consciousness; no ignorance and no end of ignorance, and so on up to no aging-and-death and no end of aging-and-death; no suffering, arising, cessation, or path; no knowledge and no attainment.
It is a list of lists with one word in front of each: 無.
Six sense organs. Six sense objects. The eighteen fields, abbreviated with 乃至 — and so on up to — which saves the text from printing all eighteen. The twelve links of dependent arising, abbreviated the same way, from 無明 ignorance at one end to 老死 aging-and-death at the other. The four noble truths: 苦集滅道. Then knowledge and attainment.
乃至 is the pair to take away from this section. It appears twice here and it does what an ellipsis does — first item … and so on up to … last item — for a list the reader is assumed to know by heart.
Tap a character above.
What follows from having nothing to gain
Because there is nothing attained: the bodhisattva, relying on the perfection of wisdom, has a mind without hindrance; and having no hindrance, has no dread, leaves inverted dreaming far behind, and reaches final nirvāṇa. The buddhas of the three times, relying on the perfection of wisdom, attain unsurpassed perfect awakening.
Watch 故 here. Session 2 gave it to you inside 何以故 and 是故; in this passage it appears four times as a clause-final because, chaining cause to cause: because nothing is attained → because they rely on wisdom → because there is no hindrance → therefore no dread. The logic is carried entirely by one character in one position.
菩提薩埵 is worth noticing. This is bodhisattva transliterated in full, four characters. The familiar 菩薩 is an abbreviation of it — first and third characters only — which is why 薩 ranks tenth in the canon while 埵 ranks 846th.
Tap a character above.
The same applies to 阿耨多羅三藐三菩提 — nine characters, pure sound, anuttara-samyak-saṃbodhi, unsurpassed perfect complete awakening. You met it in Session 2 in Subhūti's question. Do not parse it. Recognize it.
Tap a character above.
The mantra, untranslated
Therefore know that the perfection of wisdom is the great numinous mantra, the great bright mantra, the unsurpassed mantra, the mantra unequalled among equals; it can remove all suffering; it is true and not false. Therefore the mantra of the perfection of wisdom is spoken. And it is spoken thus: gate gate pāragate pārasaṃgate bodhi svāhā.
Four 是…咒 clauses in parallel, each escalating: 大神 great and numinous, 大明 great and bright, 無上 unsurpassed, 無等等 — literally no-equal-equal, unequalled even among things that have no equal. Two of the four are built with 無.
Then the text stops translating. The last fourteen characters are sound and nothing else — Sanskrit pushed through Chinese phonetics, meaning nothing in Chinese. A reader in 649 could pronounce it and could not read it, which was the point.
A note on 咒 — you will meet a different character
This edition writes 咒. The canon overwhelmingly does not: 呪 appears 17,301 times across 589 sutras, while 咒 appears only 31 times in 15. They are the same word and the same meaning — 呪 is the form the old blocks were cut with, 咒 the form modern editions prefer. Expect 呪 everywhere else you read, and do not treat it as a new character.
You have read a sutra
Here it is entire, with no English beside it. Four sessions ago this was a wall.
般若波羅蜜多心經 · T0251 · 玄奘譯 · 649 CE
觀自在菩薩行深般若波羅蜜多時，照見五蘊皆空，度一切苦厄。舍利子！色不異空，空不異色，色即是空，空即是色；受、想、行、識，亦復如是。舍利子！是諸法空相，不生不滅，不垢不淨，不增不減。是故，空中無色，無受、想、行、識；無眼、耳、鼻、舌、身、意；無色、聲、香、味、觸、法；無眼界，乃至無意識界；無無明亦無無明盡，乃至無老死亦無老死盡；無苦、集、滅、道；無智，亦無得。以無所得故，菩提薩埵依般若波羅蜜多故，心無罣礙；無罣礙故，無有恐怖，遠離顛倒夢想，究竟涅槃。三世諸佛依般若波羅蜜多故，得阿耨多羅三藐三菩提。故知般若波羅蜜多是大神咒、是大明咒、是無上咒、是無等等咒，能除一切苦，真實不虛，故說般若波羅蜜多咒。即說咒曰：揭帝揭帝般羅揭帝般羅僧揭帝菩提莎婆訶
What four hundred characters actually buys
You are not fluent, and this course will not make you fluent. What you have is different and more useful than it sounds: you can now open a Chinese sutra and find the handholds. You know where the opening frame ends and the text proper begins. You know who is speaking to whom. You can tell a denial of existence from a denial of identity. You can recognize a transliterated block and stop trying to parse it.
That is the threshold where a bilingual edition becomes usable rather than decorative — where you read the Chinese, get most of it, and check the English for the rest, instead of reading the English and glancing at the Chinese. Every translation on this site is laid out for exactly that; the sūtra collection is the place to go next.
Running total after Session 4: 102 characters taught explicitly, 19 formulas, the opening of the Diamond Sutra and the whole of the Heart Sutra read in the original.
Where the numbers come from
Every frequency on this page was counted, not estimated. The corpus is the 1,482 texts tagged
三藏/經 in the Taishō canon — 26,422,454 Chinese characters after stripping front
matter, headings, and the CBETA apparatus. Ranks are positions in the frequency list built from
that corpus; formula counts are string occurrences, given with the number of separate sutras they
appear in, because a formula used 10,000 times in one text is a quirk while one used in 700 texts
is a convention.
Counting scripture separately from commentary matters. Run the same analysis over a corpus that includes the śāstras and the vocabulary tilts hard toward Abhidharma technical terms, and the character list ends up teaching you to read treatises rather than sutras. This course teaches sutras first. On how Ru-Yi translates and why, see Translation Method.