It is the wisdom of the crocodiles, that shed tears when they would devour.

Pictures and shapes are but secondary objects and please or displease only in the memory.

We must see whether the same clock with weights will go faster at the top of a mountain or at the bottom of a mine; it is probable, if the pull of the weights decreases on the mountain and increases in the mine, that the earth has real attraction.

There is a wisdom in this beyond the rules of physic: a man's own observation what he finds good of and what he finds hurt of is the best physic to preserve health.

The creative process is a cocktail of instinct, skill, culture and a highly creative feverishness.

The doctrines of religion are resolved into carefulness; carefulness into vigorousness; vigorousness into guiltlessness; guiltlessness into abstemiousness; abstemiousness into cleanliness; cleanliness into godliness.

the serpent if it wants to become the dragon must eat itself.