We need to wake up from a thought that lasts too long.

History is the science of what never happens twice.

One should be light like a bird, and not like a feather.

To be sincere means to be the same person when one is with oneself; that is to say, alone - but that is all it means.

A limited vocabulary, but one with which you can make numerous combinations, is better than thirty thousand words that only hamper the action of the mind.

What one wrote playfully, another reads with tension and passion; what one wrote with tension and passion, another reads playfully.

Science is feasible when the variables are few and can be enumerated; when their combinations are distinct and clear. We are tending toward the condition of science and aspiring to do it. The artist works out his own formulas; the interest of science lies in the art of making science.