If you think you can do it, you can.
Know or listen to those who know.
It's always too early to quit.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
Do not weep do not wax indignant. Understand.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
Who seeks shall find.
Be gentle to all and stern with yourself.
If 50 percent of your career is not filled with failure, you're not really successful.