As in walking it is your great care not to run your foot upon a nail, or to tread awry, and strain your leg; so let it be in all the affairs of human life, not to hurt your mind or offend your judgment. And this rule, if observed carefully in all your deportment, will be a mighty security to you in your undertakings.

It is difficulties that show what men are. For the future, in case of any difficulty, remember that God, like a gymnastic trainer, has pitted you against a rough antagonist. For what end? That you may be an Olympic conqueror; and this cannot be without toil.

Common and vulgar people ascribe all ills that they feel to others; people of little wisdom ascribe to themselves; people of much wisdom, to no one.

He is free who lives as he wishes to live; who is neither subject to compulsion nor to hindrance, nor to force; whose movements to action are not impeded, whose desires attain their purpose, and who does not fall into that which he would avoid.

Man is not worried by real problems so much as by his imagined anxieties about real problems

Not things, but opinions about things, trouble men.

It was the first and most striking characteristic of Socrates never to become heated in discourse, never to utter an injurious or insulting word -- on the contrary, he persistently bore insult from others and thus put an end to the fray.