It is essential for the photographer to know the effect of his lenses. The lens is his eye, and it makes or ruins his pictures. A feeling for composition is a great asset. I think it is very much a matter of instinct. It can perhaps be developed, but I doubt if it can be learned. To achieve his best work, the young photographer must discover what really excites him visually. He must discover his own world.

Bill Brandt: Selected Texts & Bibliography (ed. MacMillan Publishing Company, 1993)