I never believed in trying to do anything. Whatever I set out to do I found I had already accomplished.

Mathematics has the completely false reputation of yielding infallible conclusions. Its infallibility is nothing but identity. Two times two is not four, but it is just two times two, and that is what we call four for short. But four is nothing new at all. And thus it goes on and on in its conclusions, except that in the higher formulas the identity fades out of sight.

two souls, alas, are housed within my breast, and each will wrestle for the mastery there.

Generosity wins favour for everyone, especially when it is accompanied by modesty.

Wanted: A dog that neither barks nor bites, eats broken glass and shits diamonds.

Plunge boldly into the thick of life, and seize it where you will, it is always interesting.

To me the external existence of my soul is proved from my idea of activity. If I work incessantly until my death, nature will give me another form of existence when the present can no longer sustain my spirit.