Knowledge is in the end based on acknowledgement.

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.

Because our goals are not lofty but illusory, our problems are not difficult, but nonsensical.

Every sign by itself seems dead. What gives it life?--In use it is alive. Is life breathed into it there?--Or is the use its life?

In the world everything is as it is and happens as it does happen. In it, there is no value, - and if there were, it would be of no value.

Language is a part of our organism and no less complicated than it.

Believers who have formulated such proofs [for God's existence] ... would never have come to believe as a result of such proofs