In art progress consists not in extension but in the knowledge of its limits. - Georges Braque

Whatever is valuable in painting is precisely what one is incapable of talking about.

I would say that it was 'poetry' which distinguishes the cubist paintings which Picasso and I arrived at intuitively from the lifeless sort of painting which those who followed us tried, with such unfortunate results, to arrive at theoretically.

You see, I have made a great discovery. I no longer believe in anything. Objects don't exist for me except in so far as a rapport exists between them or between them and myself. When one attains this harmony, one reaches a sort of intellectual non-existence — what I can only describe as a sense of peace, which makes everything possible and right. Life then becomes a perpetual revelation. That is true poetry.