Thus this Earth resembles a great animall or rather an inanimate vegetable, draws in aethereal breath for its dayly refreshment and vitall ferment and transpires again grosses exhalations. And, according to the condition of all other things living, ought to have its time of beginning, youth, old age and perishing.

Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion.

Nature is pleased with simplicity. And nature is no dummy.

Truth is the offspring of silence and meditation.

The description of right lines and circles, upon which geometry is founded, belongs to mechanics. Geometry does not teach us to draw these lines, but requires them to be drawn.

When two forces unite, their efficiency double.

Therefore, the causes assigned to natural effects of the same kind must be, so far as possible, the same.