That he ______ .

Every artist knows in his heart that he is saying something to the public. Not only does he want to say it well, but he wants it to be something which has not been said before. He hopes the public will listen and understand -- he wants to teach them, and he wants them to learn from him.
   What visual artists like painters want to teach is easy to make out but difficult to explain, because painters translate their experiences into shapes and colors, not words. They seem to feel that a certain selection of shapes and colors, out of the countless billion possible, is exceptionally interesting for them and worth showing to us. Without their work we should never have noticed these particular shapes and colors, or have felt the delight which they brought to the artist.
   Most artists take their shapes and colors from the world of nature and from human bodies. Their choices indicate these aspects of the world are worth looking at, that they contain beautiful sights. Each painter is telling us something, emphasizing something.
11. What does every artist know in his heart?