There are no sects in geometry.

It is not sufficient to see and to know the beauty of a work. We must feel and be affected by it.

Among the illusions which have invested our civilization is an absolute belief that the solutions to our problems must be a more determined application of rationally organized expertise... The reality is that our problems are largely the product of that application.

Only your friends steal your books.

When he who hears does not know what he who speaks means, and when he who speaks does not know what he himself means, that is philosophy.

When a man is in love, jealous, and just whipped by the Inquisition, he is no longer himself.

The harmony of a concert, to which you listen with delight, must have on certain classes of minute animals the effect of terrible thunder; perhaps it kills them.