.. and wanting to force nature to say things, making trees twist and rocks frown, as Gustave Doré does, or even painting it like Leornardo da Vinci, that's literature too. There's logic of colour, damn it all! The painter owes allegiance to that alone. Never to the logic of the brain; if he abandons himself to that logic, he's lost... Painting is first and foremost an optical affair. The stuff of our art is there, in what our eyes are thinking... If you respect nature, it will always unravel its meaning for you.

p. 161, in: 'What he told me – I. The motif' - Joachim Gasquet's Cézanne, - a Memoir with Conversations, (1897 - 1906)