"I believe that nothing can be more abstract, more unreal,
than what we actually see.
We know that all we can see of the objective world, as human beings,
never really exists as we see and understand it.
Matter exists, of course, but has no intrinsic meaning of its own,
such as the meanings that we attach to it.
We can know only that a cup is a cup, that a tree is a tree."
Twentieth-Century Artists on Art
by Dore Ashton, 1985