The painter should paint not only what he has in front of him, but also what he sees inside himself. If he sees nothing within, then he should stop p… - Caspar David Friedrich

The artist's feeling is his law. Genuine feeling can never be contrary to nature; it is always in harmony with her. But another person's feelings should never be imposed on us as law. Spiritual affinity leads to similarity in work, but such affinity is something entirely different from mimicry. Whatever people may say of Y's paintings and how they often resemble Z's, yet they proceed from Y and are his sole property.

People are always talking about 'incidentals'; but nothing is incidental in a picture, everything is indispensable to the whole effect, so nothing must be neglected. If a man can give value to the main part of his composition only by negligent treatment of the subordinate portions, his work is in a bad way. Everything must and can be carefully executed, without the different parts obtruding themselves on the eye. The proper subordination of the parts to the whole is not achieved by neglecting incidental features, but by correct grouping and by the distribution of light and shadow.

The divine is everywhere, even in a grain of sand; there I represented it in the reeds.