Don't be afraid of putting on color, refine the work little by little. Don't proceed according to rules and principles, but paint what you observe an… - Camille Pissarro

The ones [compliments] I value most came from Edgar Degas who said he was happy to see my work becoming more and more pure. The etcher Bracquemond, a pupil of Ingres, said - possibly he meant what he said - that my work shows increasing strength. I will calmly tread the path I have taken, and try to do my best. At bottom, I have only a vague sense of its rightness or wrongness. I am much disturbed by my unpolished and rough execution. I should like to develop a smoother technique which, while retaining the old fierceness, would be rid of those jarring notes which make it difficult to see my canvases clearly except when the light falls in front. There lies the difficulty - not to speak of drawing.

Lighten your palette [his remark to Cézanne circa 1873, to encourage Cézanne to use bright colors], paint only with the three primary colours and their derivatives.

My theory has been to discover the modern synthesis by methods based upon science, methods based upon the theory of colors discovered by M. Chevreul, in conformity with the experiments of Maxwell and the measurements of N. 0. Rood; to substitute the optical mingling for the mingling of pigments; in other words, the decomposition of all the colors into their constituent elements; because the optical mingling excites much more intense luminosity than the mingling of pigments. As for the execution, we regard it as nothing; it is at any rate only unimportant, art having nothing to do with it. According to us, the sole originality consists in the character of the drawing and the vision individual to each artist.