Never complain and never explain.
Always desire to learn something useful.
Well done is better than well said.
The secret of getting ahead is getting started.
Without hard work, nothing grows but weeds.
Be kind whenever possible. It is always possible.
Be thine own palace, or the world's thy jail.
If you're going through hell, keep going.
By failing to prepare, you are preparing to fail.
It's always too early to quit.
Thought is the original source of all wealth, all success, all material gain, all great discoveries and inventions, and of all achievement.
Do not trust to the cheering, for those persons would shout as much if you and I were going to be hanged.