Nature does not complete things. She is chaotic. Man must finish, and he does so by making a garden and building a wall.

The world, nature, human beings, do not move like machines. The edges are never clear-cut, but always frayed. Nature never draws a line without smudging it.

Those who are inspired by a model other than Nature, labor in vain.

Experiment is the sole interpreter of the artifices of Nature.

Vitality and beauty are gifts of Nature for those who live according to its laws.

Painting embraces and contains within itself all the things which nature produces or which results from the fortuitous actions of men... he is but a poor master who makes only a single figure well.