The work is an absolute necessity for me. I can't put it off, I don't care for anything but the work; that is to say, the pleasure in something else ceases at once and I become melancholy when I can't go on with my work. Then I feel like a weaver who sees that his threads are tangled, and the pattern he had on the loom is gone to hell, and all his thought and exertion is lost.
— VINCENT VAN GOGH