It is all well and good to copy what one sees, but it is much better to draw only what remains in one's memory. This is a transformation in which imagination and memory collaborate.
Notes from Wikiquote
Degas confided this to Pierre-George Jeanniot
He [ Corot ] is always the strongest, he has foreseen everything.
What a pity we allowed ourselves to be called Impressionists.
Drawing is not the same as form; it is a way of seeing form.
I believe Corot painted a tree better that any of us, but still I find him superior in his figures.
Quote text and notes from Wikiquote: Edgar Degas (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.