An image is not a picture, but a picture can correspond to it.

Nothing is more important for teaching us to understand the concepts we have than to construct fictitious ones.

When we can't think for ourselves, we can always quote

The so-called law of induction cannot possibly be a law of logic, since it is obviously a proposition with a sense.--Nor, therefore, can it be an a priori law.

What has history to do with me? Mine is the first and only world! I want to report how I find the world. What others have told me about the world is a very small and incidental part of my experience. I have to judge the world, to measure things.

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.

Make sure that your religion is a matter between you and God only.