We must always apologize for talking painting.

In the physical world, one cannot increase the size or quantity of anything without changing its quality. Similar figures exist only in pure geometry.

Whatever we succeed in doing is a transformation of something we have failed to do. Thus, when we fail, it is only because we have given up.

The universe is built on a plan the profound symmetry of which is somehow present in the inner structure of our intellect.

Serious people have few ideas. People with ideas are never serious.

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

You have certainly observed the curious fact that a given word which is perfectly clear when you hear it or use it in everyday language, and which does not give rise to any difficulty when it is engaged in the rapid movement of an ordinary sentence becomes magically embarrassing, introduces a strange resistance, frustrates any effort at definition as soon as you take it out of circulation to examine it separately and look for its meaning after taking away its instantaneous function.