A picture must not be invented, but felt. . .
Close your bodily eye so that you may see your picture first with the spiritual eye. Then bring to the light of day that which you have seen in the darkness so that it may react upon others from the outside inwards...
The artist should not only paint what he sees before him, but also what he sees within him. If, however, he sees nothing within him, then he should also omit to paint that which he sees before him. Otherwise his pictures will resemble those folding screens behind which one expects to find only the sick or even the dead.
I must be entirely by myself, and know that I am alone in order to see and perceive Nature completely. Nothing should stand between her and myself. I must give myself to my surroundings, must merge with my clouds and cliffs in order to become what I am.