Tao Te Ching Chapter 7: Concealing the Light

Why do heaven and earth last? Lao Tzu's answer founds the chapter: because they do not live for themselves — and so they are able to endure. Self-interest, the logic runs, is self-consuming; what hoards its own existence burns through it, while what pours itself out is continually renewed. Permanence belongs to the selfless.

The sage applies the physics directly: he puts himself last and finds himself first; sets himself outside and finds himself preserved. This is not a martyr's bargain but an observed law — the person who stops jockeying for position is the one everyone ends up trusting with it. The chapter closes with a question and its answer folded together: is it not because he is without self-interest that his own purpose is fulfilled? The paradox is exact and testable in ordinary life: the surest way to secure yourself is to stop securing yourself. Chapter 66's rivers-and-seas image will make the same point as geography.