Physics, beware of metaphysics.

To explain all nature is too difficult a task for any one man or even for any one age

Godliness consists in the knowledge love & worship of God, Humanity in love, righteousness & good offices towards man.

Poetry is a kind of ingenious nonsense.

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

The seed of a tree has the nature of a branch or twig or bud. It is a part of the tree, but if separated and set in the earth to be better nourished, the embryo or young tree contained in it takes root and grows into a new tree.

I do not feign hypotheses.