The noblest pleasure is the joy of understanding.

Men born in hot countries love the night because it refreshes them and have a horror of light because it burns them.

Now do you not see that the eye embraces the beauty of the whole world? It counsels and corrects all the arts of mankind... it is the prince of mathematics, and the sciences founded on it are absolutely certain. It has measured the distances and sizes of the stars it has discovered the elements and their location... it has given birth to architecture and to perspective and to the divine art of painting.

He who thinks little errs much.

Instrumental or mechanical science is the noblest and above all others, the most useful.

The length of a man's outspread arms is equal to his height.

Common Sense is that which judges the things given to it by other senses.