Weissenbruch to Anton Mauve: He [ Vincent van Gogh ] is drawing damn well, I could paint after his studies.
Better send in one good picture than a lot of poor ones, but then that good one must be so good that it almost walks out of the frame and becomes a portion of nature itself.
I am here the doctor [in his studio], bringing his morning visit. I feel them all [his watercolors] the pulse. One I say: Wait, I'll make you an ointment, so you will refresh completely. The other I say: Friend, you need air, and even more the light.