All paid jobs absorb and degrade the mind – Aristotle

Those that know, do. Those that understand, teach – Aristotle

Wishing to be friends is quick work, but friendship is a slow ripening fruit – Aristotle

In making a speech one must study three points: first, the means of producing persuasion; second, the language; third the proper arrangement of the various parts of the speech – Aristotle

It is just that we should be grateful, not only to those with whose views we may agree, but also to those who have expressed more superficial views; for these also contributed something, by developing before us the powers of thought – Aristotle

For though we love both the truth and our friends, piety requires us to honor the truth first – Aristotle