Never complain and never explain.
Be thine own palace, or the world's thy jail.
Well done is better than well said.
You never know what motivates you.
It's always too early to quit.
The secret of getting ahead is getting started.
To know oneself, one should assert oneself.
Be kind whenever possible. It is always possible.
If you're going through hell, keep going.
Be gentle to all and stern with yourself.
The Peking man was a thinking being, standing erect, dating to the beginning of the Ice Age.