Whether you believe you can do a thing or not, you are right.
Don't let life discourage you; everyone who got where he is had to begin where he was.
Speak what you think today in words as hard as cannon-balls; and tomorrow speak what tomorrow thinks in hard words again, though it contradict every thing you said to-day.
Those who stand for nothing fall for anything.
You can complain because roses have thorns, or you can rejoice because thorns have roses.
No pessimist ever discovered the secret of the stars, or sailed to an uncharted land, or opened a new doorway for the human spirit.
He who angers you conquers you.
How much more grievous are the consequences of anger than the causes of it.
If you are patient in one moment of anger, you will escape a hundred days of sorrow.
It is not fair to ask of others what you are not willing to do yourself.