Mechanics is the paradise of the mathematical sciences because by means of it one comes to the fruits of mathematics.

The variety of colour in objects cannot be discerned at a great distance, excepting in those parts which are directly lighted up by the solar rays.

It is ordained that to the ambitious, who derive no satisfaction from the gifts of life and the beauty of the world, life shall be a cause of suffering, and they shall possess neither the profit nor the beauty of the world.

The discovery of a good wine is increasingly better for mankind than the discovery of a new star.

Though I may not . . . be able to quote other authors, I shall rely on that which is much greater and more worthy - on experience.

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

He who fears dangers will not perish by them.