"A distiction is made between painters who work
directly from nature and those who work purely from imagination.
Personally, I think neither of these methods must be preferred to the exclusion
of the other. Both may be used by the same individual, either because he
needs contact with objects in order to receive sensations that will excite his
creative faculty, or his sensations are already organized. In either case
he will be able to arrive at that totality which constitutes a picture."