Philosophy is not a theory but an activity.

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

Think of the tools in a tool-box: there is a hammer, pliers, a saw, a screwdriver, a rule, a glue-pot, nails and screws.--The function of words are as diverse as the functions of these objects.

My attitude towards him is an attitude towards a soul. I am not of the opinion that he has a soul. . . .

Since social relationships are always ambiguous, since my thought is only a unit, since my thoughts create rifts as much as they unite, since my words establish contacts by being spoken and create isolation by remaining unspoken, since an immense moat separates the subjective certitude that I have for myself from the objective reality that I represent to others, since I never stop finding myself guilty even though I feel I am innocent.

Talent is a spring from which fresh water always flows.- But this spring is worthless if no good use is made of it.

A new word is like a fresh seed sown on the ground of the discussion.