Truth is the offspring of silence and meditation.

To derive two or three general Principles of Motion from Phænomena, and afterwards to tell us how the Properties and Actions of all corporeal Things follow from those manifest Principles, would be a very great step in Philosophy.

Pictures, propagated by motion along the fibers of the optic nerves in the brain, are the cause of vision.

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.

Atheism is so senseless. When I look at the solar system, I see the earth at the right distance from the sun to receive the proper amounts of heat and light. This did not happen by chance.

Atheism is so senseless and odious to mankind that it never had many professors.

Therefore to the same natural effects we must, as far as possible, assign the same causes.