Never complain and never explain.
Be gentle to all and stern with yourself.
The wise does at once what the fool does at last.
If you think you can do it, you can.
Either you run the day or the day runs you.
I can, therefore I am.
To be a good loser is to learn how to win.
Only the educated are free.
Begin to be now what you will be hereafter.
Be thine own palace, or the world's thy jail.
Most of man's problems upon this planet, in the long history of the race, have been met and solved either partially or as a whole by experiment based on common sense and carried out with courage.