The one exclusive sign of thorough knowledge is the power of teaching.

By 'life,' we mean a thing that can nourish itself and grow and decay.

Man's best friend is one who wishes well to the object of his wish for his sake, even if no one is to know of it.

The specific excellence of verbal expression in poetry is to be clear without being low.

Teachers, who educate children, deserve more honour than parents, who merely gave them birth; for the latter provided mere life, while the former ensure a good life.

We may assume the superiority ceteris paribus of the demonstration which derives from fewer postulates or hypotheses - in short, from fewer premises.

Such an event is probable in Agathon's sense of the word: 'it is probable,' he says, 'that many things should happen contrary to probability.'