The soul of animals is characterized by two faculties, (a) the faculty of discrimination which is the work of thought and sense, and (b) the faculty of originating local movement.
Aristotle.. for desire is like a wild beast, and anger perverts rulers and the very best of men. Hence law is intelligence without appetition.
AristotleThere are branches of learning and education which we must study merely with a view to leisure spent in intellectual activity, and these are to be valued for their own sake; whereas those kinds of knowledge which are useful in business are to be deemed necessary, and exist for the sake of other things.
Aristotle