When seen as a whole, art derives from a person's desire to communicate himself to another. I do not believe in an art which is not forced into existence by a human being's desire to open his heart. All art, literature, and music must be born in your heart's blood. Art is your heart's blood.

Manuscript (1891); as quoted in Edvard Munch and the Physiology of Symbolism (2002) by Shelley Wood Cordulack