It is vain to ask of the gods what man is capable of supplying for himself.

Don't fear god, Don't worry about death; What is good is easy to get, and What is terrible is easy to endure

Of all the gifts that wise Providence grants us to make life full and happy, friendship is the most beautiful.

When someone admits one and rejects another which is equally in accordance with the appearances, it is clear that he has quitted all physical explanation and descended into myth.

Any man who does not think that what he has is more than ample, is an unhappy man, even if he is the master of the whole world.

Happiness is man's greatest aim in life. Tranquility and rationality are the cornerstones of happiness.

Moreover, the universe as a whole is infinite, for whatever is limited has an outermost edge to limit it, and such an edge is defined by something beyond. Since the universe has no edge, it has no limit; and since it lacks a limit, it is infinite and unbounded. Moreover, the universe is infinite both in the number of its atoms and in the extent of its void.