Cliche refers to words, commonplace to ideas. Cliche describes the form or the letter, commonplace the substance or spirit. To confuse them is to confuse the thought with the expression of the thought. The cliche is immediately perceivable; the commonplace very often escapes notice if decked out in original dress. There are few examples, in any literature, of new ideas expressed in original form. The most critical mind must often be content with one or the other of these pleasures, only too happy when it is not deprived of both at once, which is not too rarely the case.

Science is the only truth and it is the great lie. It knows nothing, and people think it knows everything. It is misrepresented. People think that science is electricity, automobilism, and dirigible balloons. It is something very different. It is life devouring itself. It is the sensibility transformed into intelligence. It is the need to know stifling the need to live. It is the genius of knowledge vivisecting the vital genius.

Art includes everything that stimulates the desire to live

Man has made use of his intelligence; he invented stupidity.

In order to understand life it is not only necessary not to be indifferent to men, but not to be indifferent to flocks, to trees. One should be indifferent to nothing.

The human mind is so complex and things are so tangled up with each other that, to explain a blade of straw, one would have to take to pieces an entire universe. A definition is a sack of flour compressed into a thimble.

The terrible thing about the quest for truth is that you find it.