Reading guide
The teaching in one sentence
Sense restraint is a vital condition for ethical conduct, ethical conduct for right immersion, right immersion for true knowledge and vision, true knowledge and vision for disillusionment and dispassion, and disillusionment and dispassion for knowledge and vision of freedom — each stage destroyed if the one before it is missing, fulfilled if the one before it is fulfilled.
A chain, not a list of equally weighted virtues
Unlike many of this chapter's six-item lists, this discourse names five stages in an explicit dependency relationship, each stated to be a “vital condition” (upanisā) for the one after it. The structure is closer to a causal argument than an inventory: sense restraint is not simply one virtue among several but the specific foundation without which the next stage cannot arise at all.
Both directions stated in full, not left to inference
The discourse does not state the destructive chain and leave the constructive one implicit. It restates the entire five-step sequence a second time in positive form — fulfilled sense restraint fulfilling ethics, fulfilled ethics fulfilling immersion, and so on — giving both directions equal, explicit treatment rather than trusting the reader to reverse the logic unaided.
A tree with no branches or foliage
The shared simile closing both halves of the discourse pictures a tree lacking branches and foliage, whose “shoots, bark, softwood, and heartwood would not grow to fullness” — and, in the positive half, a tree complete with branches and foliage, whose parts all grow to fullness. The image locates the damage or growth not at one single point but distributed through the whole structure, consistent with the discourse's chain logic: a break anywhere upstream affects everything downstream.
Where the chain ends, and why that matters
The final stage, “knowledge and vision of freedom” (vimuttiñāṇadassana), is the terminus of the whole sequence, not merely one more link. Everything from sense restraint onward is oriented toward this end point; the discourse's structure makes clear that sense restraint, the most modest-sounding item in the chain, is nonetheless the condition on which the entire sequence, up to and including final freedom, depends.
Key terms
The text
The chain of destruction
§1“Mendicants, when there is no sense restraint, one who lacks sense restraint has destroyed a vital condition for ethical conduct. When there is no ethical conduct, one who lacks ethics has destroyed a vital condition for right immersion. When there is no right immersion, one who lacks right immersion has destroyed a vital condition for true knowledge and vision. When there is no true knowledge and vision, one who lacks true knowledge and vision has destroyed a vital condition for disillusionment and dispassion. When there is no disillusionment and dispassion, one who lacks disillusionment and dispassion has destroyed a vital condition for knowledge and vision of freedom. Suppose there was a tree that lacked branches and foliage. Its shoots, bark, softwood, and heartwood would not grow to fullness. In the same way, when there is no sense restraint, one who lacks sense restraint has destroyed a vital condition for ethical conduct. … One who lacks disillusionment and dispassion has destroyed a vital condition for knowledge and vision of freedom.
The chain of fulfillment
§2When there is sense restraint, one who has fulfilled sense restraint has fulfilled a vital condition for ethical conduct. When there is ethical conduct, one who has fulfilled ethical conduct has fulfilled a vital condition for right immersion. When there is right immersion, one who has fulfilled right immersion has fulfilled a vital condition for true knowledge and vision. When there is true knowledge and vision, one who has fulfilled true knowledge and vision has fulfilled a vital condition for disillusionment and dispassion. When there is disillusionment and dispassion, one who has fulfilled disillusionment and dispassion has fulfilled a vital condition for knowledge and vision of freedom. Suppose there was a tree that was complete with branches and foliage. Its shoots, bark, softwood, and heartwood would all grow to fullness. In the same way, when there is sense restraint, one who has fulfilled sense restraint has fulfilled a vital condition for ethical conduct. … One who has fulfilled disillusionment and dispassion has fulfilled a vital condition for knowledge and vision of freedom.”
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