Something is infinite if, taking it quantity by quantity, we can always take something outside.

If, then, there is some end of the things we do, which we desire for its own sake (everything else being desired for the sake of this), and if we do not choose everything for the sake of something else (for at that rate the process would go on to infinity, so that our desire would be empty and vain), clearly this must be the good and the chief good.

Not to know of what things one should demand demonstration, and of what one should not, argues want of education.

Let us be well persuaded that everyone of us possesses happiness in proportion to his virtue and wisdom, and according as he acts in obedience to their suggestion.

People of superior refinement and of active disposition identify happiness with honour; for this is roughly speaking, the end of political life.

In part, art completes what nature cannot elaborate; and in part it imitates nature.

Happiness depends upon ourselves.