It is as easy to draw back a stone thrown with force from the hand, as to recall a word once spoken.
It is not hoary hairs that bring wisdom; some have an old head on young shoulders.
The chief beginning of evil is goodness in excess.
The school of hard knocks is an accelerated curriculum.
Man must be prepared for every event of life, for there is nothing that is durable.
Know thyself means this, that you get acquainted with what you know, and what you can do.