To live is not to live for one's self; let us help one another.
In many things it is not well to say, "Know thyself"; it is better to say, "Know others."
It must be that evil communications corrupt good dispositions.
By associating with wise people you will become wise yourself.
Know thyself means this, that you get acquainted with what you know, and what you can do.
It is not white hair that engenders wisdom.