Don't raise your voice, improve your argument.
Where you stand depends on where you sit.
Science may set limits to knowledge, but should not set limits to imagination.
Strength does not come from physical capacity. It comes from an indomitable will.
Obsession is the wellspring of genius and madness.
Those who see the invisible can do the impossible.
Every intelligent individual wants to know what makes him tick, and yet is at once fascinated and frustrated by the fact that oneself is the most difficult of all things to know.
Throw your heart over the fence and the rest will follow.
Work is the price which is paid for reputation.
Be sure you put your feet in the right place, then stand firm.
We may encounter many defeats but we must not be defeated.
Respect yourself if you would have others respect you.
He that cannot reason is a fool. He that will not is a bigot. He that dare not is a slave.
We learn from our gardens to deal with the most urgent question of the time: How much is enough?
Circumstances do not make a man, they reveal him.
Fear doesn't exist anywhere except in the mind.
Good means not merely not to do wrong, but rather not to desire to do wrong.
One who gains strength by overcoming obstacles possesses the only strength which can overcome adversity.
None but ourselves can free our minds.
You have heard that it was said, 'Eye for eye, and tooth for tooth.' But I tell you, do not resist an evil person. If someone strikes you on the right cheek, turn to him the other also.
If you do what you've always done, you'll get what you've always gotten.