There 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.
AristotleThe pleasures arising from thinking and learning will make us think and learn all the more. 1153a 23
AristotleTwo characteristic marks have above all others been recognized as distinguishing that which has soul in it from that which has not - movement and sensation.
AristotleA tragedy is a representation of an action that is whole and complete and of a certain magnitude. A whole is what has a beginning and middle and end.
AristotleBut then in what way are things called good? They do not seem to be like the things that only chance to have the same name. Are goods one then by being derived from one good or by all contributing to one good, or are they rather one by analogy? Certainly as sight is in the body, so is reason in the soul, and so on in other cases.
Aristotle