There is one thing one has to have either a soul that is cheerful by nature, or a soul made cheerful by work, love, art, and knowledge.

But thought is one thing, the deed is another, and the image of the deed still another: the wheel of causality does not roll between them.

No price is too high to pay for the privilege of owning yourself.

You know these things as thoughts, but your thoughts are not your experiences, they are an echo and after-effect of your experiences: as when your room trembles whe na carriage goes past. I however am sitting in the carriage, and often I am the carriage itself. Ina man who thinks like this, the dichotomy between thinking and feeling, intellect and passion, has really disappeared. He feels his thoughts. He can fall in love with an idea. An idea can make him ill.

There is not sufficient religion in the world merely to put an end to the number of religions.

No more fiction, for now we calculate; but that we may calculate, we had to make fiction first.

The real world is much smaller than the imaginary