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

Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things.

'Tis the temper of the hot and superstitious part of mankind in matters of religion ever to be fond of mysteries, and for that reason to like best what they understand least.

You have to make the rules, not follow them

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

The great ocean of truth lay all undiscovered before me.

All my discoveries have been made in answer to prayer.