The virtue of a faculty is related to the special function which that faculty performs. Now there are three elements in the soul which control action and the attainment of truth: namely, Sensation, Intellect, and Desire. Of these, Sensation never originates action, as is shown by the fact that animals have sensation but are not capable of action.
AristotleWhether we call it sacrifice, or poetry, or adventure, it is always the same voice that calls.
AristotleThose who excel in virtue have the best right of all to rebel, but then they are of all men the least inclined to do so.
AristotleIf, 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.
Aristotle