Being willing is not enough. We must do.

O Time with your teethy years! You swallow up all things little by little in a slow-motion, wrinkling process of dying.

Painting is concerned with the ten things you can see: these are darkness and brightness, substance and color, form and place, remoteness and nearness, movement and rest.

No human investigation can be called real science if it cannot be demonstrated mathematically.

We might say that the earth has the spirit of growth; that its flesh is the soil.

The senses are of the earth, the reason stands apart from them in contemplation.

Small rooms or dwellings discipline the mind, large ones weaken it.