I must plunge into the water of doubt again and again.

To convince someone of the truth, it is not enough to state it, but rather one must find the path from error to truth.

The difficulty in philosophy is to say no more than we know.

But ordinary language is all right.

What should we gain by a definition, as it can only lead us to other undefined terms?

For remember that in general we don't use language according to strict rules — it hasn't been taught us by means of strict rules, either.

The idea that in order to get clear about the meaning of a general term one had to find the common element in all its applications has shackled philosophical investigation; for it has not only led to no result, but also made the philosopher dismiss as irrelevant the concrete cases, which alone could have helped him understand the usage of the general term.

(About Jesus) If He did not rise again, then He rotted in the grave like any other human being. He died and his body rotted.

Tell them I've had a wonderful life.

What I give is the morphology of the use of an expression. I show that it has kinds of uses of which you had not dreamed. In philosophy one feels forced to look at a concept in a certain way. What I do is suggest, or even invent, other ways of looking at it. I suggest possibilities of which you had not previously thought. You thought that there was one possibility, or only two at most. But I made you think of others. Furthermore, I made you see that it was absurd to expect the concept to conform to those narrow possibilities. Thus your mental cramp is relieved, and you are free to look around the field of use of the expression and to describe the different kinds of uses of it.