For the real difference between humans and other animals is that humans alone have perception of good and evil, just and unjust, etc. It is the sharing of a common view in these matters that makes a household and a state.
AristotleThe pleasures arising from thinking and learning will make us think and learn all the more. 1153a 23
AristotleA good man may make the best even of poverty and disease, and the other ills of life; but he can only attain happiness under the opposite conditions
AristotleIf everything when it occupies an equal space is at rest, and if that which is in locomotion is always occupying such a space at any moment, the flying arrow is therefore motionless.
Aristotle