6.521 The solution of the problem of life is perceived in the vanishing of this problem.

(Is not this the reason why people to whom the meaning [Sinn] of life has become clear after long doubt could not then say in what this meaning consists?)

Anscombe says (p. 170) that this shows that Wittgenstein does not think all thoughts of the meaning of life are nonsense. After all, how could it become clear unless it could at least be shown?