The human foot is a masterpiece of engineering and a work of art.

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.

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

It is useful to constantly observe, note, and consider.

The mole has very small eyes and it always lives under ground; and it lives as long as it is in the dark but when it comes into the light it dies immediately, because it becomes known;--and so it is with lies.

Nothing will be left, Nothing in the air, nothing under the earth, nothing in the waters. All will be exterminated.

Nature varies the seed according to the variety of the things she desires to produce in the world.