Thou wilt find rest from vain fancies if thou doest every act in life as though it were thy last.

The high minded man must care more for the truth than for what people think.

Teaching is the highest form of understanding.

Happiness does not lie in amusement; it would be strange if one were to take trouble and suffer hardship all one's life in order to amuse oneself.

All human happiness or misery takes the form of action; the end for which we live is a certain kind of action.

What the statesman is most anxious to produce is a certain moral character in his fellow citizens, namely a disposition to virtue and the performance of virtuous actions.

Whether if soul did not exist time would exist or not, is a question that may fairly be asked; for if there cannot be someone to count there cannot be anything that can be counted, so that evidently there cannot be number; for number is either what has been, or what can be, counted.