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

When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.

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

Knowledge of the past and of the places of the earth is the ornament and food of the mind of man.

There are four Powers: memory and intellect, desire and covetousness. The two first are mental and the others sensual. The three senses: sight, hearing and smell cannot well be prevented; touch and taste not at all.

Each man is always in the middle of the surface of the earth and under the zenith of his own hemisphere, and over the centre of the earth.