I felt the most intense pleasure in piercing the stone in order to make an abstract form and space; quite a different sensation from that of doing it for the purpose of realism.
Black and white is abstract; color is not. Looking at a black and white photograph, you are already looking at a strange world.
It is often my nature to be abstract, hidden in plain sight, or nowhere at all.
Money is human happiness in the abstract; he, then, who is no longer capable of enjoying human happiness in the concrete devotes himself utterly to money.
We shall suffer no attachment to literature, no taste for abstract discussion, no love of purely intellectual theories, to seduce us from our devotion to the cause of the oppressed, the down trodden, the insulted and injured masses of our fellow men.