We cannot live pleasantly without living wisely and nobly and righteously.

Necessity is an evil; but there is no necessity for continuing to live subject to necessity.

Let no young man delay the study of philosophy, and let no old man become weary of it; for it is never too early nor too late to care for the well-being of the soul.

A beneficent person is like a fountain watering the earth, and spreading fertility; it is, therefore, more delightful to give than to receive.

I was not, I was, I am not, I care not. (Non fui, fui, non sum, non curo)

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.

We have been born once and there can be no second birth. Fir all eternity we shall no longer be. But you, although you are not master of tomorrow, are postponing your happiness.