Conduct yourself towards your parents as you would have your children conduct themselves towards you.

It is not fitting that the evil produced by men should be imputed to things; let those bear the blame who make an ill use of things in themselves good.

Always when you are about to say anything, first weigh it in your mind; for with many the tongue outruns the thought.

Be gracious to all men, but choose the best to be your friends.

But I marvel when I observe these men setting themselves up as instructors of youth who cannot see that they are applying the analogy of an art with hard and fast rules to a creative process

Let there be but two occasions for speech - when the subject is one which you thoroughly know and when it is one on which you are compelled to speak. On these occasions alone is speech better than silence; on all others, it is better to be silent than to speak.

Those who directed the state in the time of Solon and Cleisthenes did not establish a polity which ... trained the citizens in such fashion that they looked upon insolence as democracy, lawlessness as liberty, impudence of speech as equality, and licence to do what they pleased as happiness, but rather a polity which detested and punished such men and by so doing made all the citizens better and wiser.