Any painter who thinks he has something to say to the people, or anything to contribute to the world of ideas or literature, is treading dangerous ground; the influence of literature on painting is at all times dangerous if not deadly. Painting is a visual art; and the job of the artist must be to create in visual terms the tension experienced. One cannot argue or explain in paint. The aim is not to put in everything that will help, but as little as one can help, so that a picture is in one sense a sum of destructions. It is a question of honesty and courage: One produces only the necessary — Degas

The Artist Speaks (1951)