Learning is the only thing that never disappoints us.

Movement will fail sooner than usefulness.

In the days of thy youth seek to obtain that which shall compensate the losses of thy old age.

One can have no more mastery over the environment, than one has over himself.

A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.

When you look at a wall spotted with stains...you may discover a resemblance to various landscapes, beautiful with mountains, rivers, rocks, trees. Or again, you may see battles and figures in action, or strange faces and costumes, and an endless variety of objects which you could reduce to complete and well-drawn figures.

Your brain is much better than you think; just use it!