6.52. We feel that even if all possible scientific questions be answered, the problems of life have still not been touched at all. Of course there is then no question left, and just this is the answer.
6.521. The solution of the problem of life is seen in the vanishing of this problem. (Is not this the reason why men to whom after long doubting the sense of life became clear, could not then say wherein this sense consisted?)
Notoriously, Wittgenstein claimed that "nonsensicality" is the "very essence" of ethical expressions. I think there's something to what he said, but also that there are things that can be said about ethics (or perhaps I should say, shown...).