Aristotle
(page 2)
He who is unable to live in society, or who has no need because he is sufficient for himself, must be either a beast or a god.
Humor is the only test of gravity, and gravity of humor; for a subject which will not bear raillery is suspicious, and a jest which will not bear serious examination is false wit.
One swallow does not make a summer, neither does one fine day; similarly one day or brief time of happiness does not make a person entirely happy.
Plato is dear to me, but dearer still is truth.
The moral virtues, then, are produced in us neither by nature nor against nature. Nature, indeed, prepares in us the ground for their reception, but their complete formation is the product of habit.
Time crumbles things; everything grows old under the power of Time and is forgotten through the lapse of Time.
To give a satisfactory decision as to the truth it is necessary to be rather an arbitrator than a party to the dispute.