It is easy to distinguish between the joking that reflects good breeding and that which is coarse-the one, if aired at an apposite moment of mental relaxation, is becoming in the most serious of men, whereas the other is unworthy of any free person, if the content is indecent or the expression obscene.
There is in fact a true law namely right reason, which is in accordance with nature, applies to all men and is unchangeable and eternal. ... It will not lay down one rule at Rome and another at Athens, nor will it be one rule today and another tomorrow. But there will be one law eternal and unchangeable binding all times and upon all peoples.
Our character is not so much the product of race and heredity as of those circumstances by which nature forms our habits, by which we are nurtured and live.
Leisure consists in all those virtuous activities by which a man grows morally, intellectually, and spiritually. It is that which makes a life worth living.
When you wish to instruct, be brief; that men's [children's] minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.
It is a man's own dishonesty, his crimes, his wickedness, and boldness, that takes away from him soundness of mind; these are the furies, these the flames and firebrands, of the wicked.
There is, I know not how, a certain presage, as it were, of a future existence; and this takes the deepest root, and is most discoverable, in the greatest geniuses and most exalted souls.
Friendship is nothing else than entire fellow feeling as to all things human and divine with mutual good-will and affection; and I doubt whether anything better than this, wisdom alone excepted, has been given to man.