This procedure [selecting the simplest law], however, has no logical justification but only a psychological one.

A philosopher always finds more grass to feed upon in the valleys of stupidity than on the arid heights of intelligence.

I am sitting with a philosopher in the garden; he says again and again 'I know that that’s a tree', pointing to a tree that is near us. Someone else arrives and hears this, and I tell him: 'This fellow isn’t insane. We are only doing philosophy.

The truth of the thoughts that are here set forth seems to me unassailable and definitive. I therefore believe myself to have found, on all essential points, the final solution of the problems. And if I am not mistaken in this belief, then the second thing in which the value of this work consists is that it shows how little is achieved when these problems are solved.

Most of the propositions and questions to be found in philosophical works are not false but nonsensical.

The real discovery is the one which enables me to stop doing philosophy when I want to. The one that gives philosophy peace, so that it is no longer tormented by questions which bring itself into question.

Concerning that which cannot be talked about, we should not say anything.