The wisest and noblest teacher is nature itself.

If you cause your ship to stop and place the head of a long tube in the water and place the outer extremity to your ear, you will hear ships at a great distance from you.

When the sun is covered by clouds, objects are less conspicuous, because there is little difference between the light and shade of the trees and the buildings being illuminated by the brightness of the atmosphere which surrounds the objects in such a way that the shadows are few, and these few fade away so that their outline is lost in haze.

Not to anticipate is already to moan.

The light and heat of the universe comes from the sun, and its cold and darkness from the withdrawal of the sun.

In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time.

The days are long enough for those who use them.