We are better able to study our neighbours than ourselves, and their actions than our own.
AristotleMan is the metre of all things, the hand is the instrument of instruments, and the mind is the form of forms.
AristotleThe 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.
Aristotle