To draw is to look, examining the structure of appearances.
A drawing of a tree shows, not a tree, but a tree-being-looked-at.
Whereas the sight of a tree is registered almost instantaneously,
the examination of the sight of a tree (a tree-being-looked-at)
not only takes minutes or hours instead of a fraction of a second,
it also involves, derives from, and refers back to,
much previous experience of looking,
Within the instant of the sight of a tree is established a life-experience.
This is how the act of drawing refuses the process of disappearances
and proposes the simultaneity of a multitude of moments.
Berger On Drawing - John Berger