Like Diamond

Reading guide

The teaching in one sentence

A mind is either raw and discharging, or lit by a flash of understanding, or beyond damage.

The open sore

The definition comes before the image and is unusually behavioral: irritable and bad-tempered; even when lightly criticized they lose their temper, becoming annoyed, hostile, and hard-hearted, and they display annoyance, hate, and bitterness.

Two details carry the description. The provocation is small — the Pāli specifies that the criticism is slight. And the response is not merely felt but displayed: the discourse lists both the internal states and their exhibition.

Then the image: a festering sore which, struck with a stick or a stone, discharges even more. What makes it precise is that a sore does not respond to being struck by hurting more; it responds by producing more of what it was already producing. The bad temper was there before the criticism. The criticism did not cause it — it released it.

That is a more useful account of irritability than one which treats the provocation as the cause. It also explains why the size of the provocation does not predict the size of the response, which is the detail the definition led with.

The lightning

The definition is the four truths truly understood. The image is a person with keen eyes in the dark of the night who sees by a flash of lightning.

Every element does work. The eyes are keen — the capacity is already there. The night is dark — the ordinary condition is not seeing. And the flash is brief; what it gives is not illumination that lasts but a moment in which what is there becomes visible. A person who has seen a landscape by lightning knows the landscape afterward, in the dark.

The simile is often read as describing the suddenness of insight, and it does. But its more interesting claim is about what the flash reveals: not something new arriving, but what was there all along, unlit.

The diamond

The definition is the highest: realizing the undefiled freedom of heart and freedom by wisdom in this very life, having realized it with one’s own insight due to the ending of defilements. The image is a diamond, which cannot be cut by anything at all, not even a gem or a stone.

Vajira means both diamond and thunderbolt, and the word’s later career in Buddhism is enormous — the Diamond Sūtra, whose full title names the vajracchedikā, the diamond-cutter, and the whole of Vajrayāna. What the image asserts here is narrow and physical: hardness, in the sense of not being alterable by anything brought against it.

Read against the first simile, the contrast is exact. The open sore is defined by what happens when it is struck; the diamond is defined by what does not. Both are descriptions of a response to contact, and the middle term — the lightning — is the one that is not about contact at all.

The gap in the sequence

It is worth stating plainly that these three are not a ladder with equal rungs. The first describes a person with a temper — a condition anyone can recognize in themselves or a colleague. The second describes someone who has understood the four truths, which in the canon’s technical vocabulary means at least stream-entry. The third is full awakening.

So the sequence runs: ordinary bad temper, then a stage of the noble path, then the end of the path. Nothing occupies the space between the first and the second, and the discourse does not remark on it.

That shape is characteristic of the Aṅguttara’s three-person lists and worth flagging for students, who reasonably expect a middle term to be a middle. What these lists usually give instead is one recognizable case and two attainments — the recognizable case doing the work of making the set memorable, and the other two doing the work of naming what is possible.

Key terms