Anyone who conducts an argument by appealing to authority is not using his intelligence; he is just using his memory.

Common Sense is that which judges the things given to it by other senses.

Among the great things which are found among us the existence of Nothing is the greatest.

That which has no limitations, has no form.

Nature varies the seed according to the variety of the things she desires to produce in the world.

Patience serves as a protection against wrongs as clothes do against cold. For if you put on more clothes as the cold increases, it will have no power to hurt you. So in like manner you must grow in patience when you meet with great wrongs, and they will then be powerless to vex your mind.

A painter should begin every canvas with a wash of black, because all things in nature are dark except where exposed by the light.