The people who are crazy enough to think they can change the world are the ones who do.

If you're afraid of failing you won't get very far.

Don't let the noise of others' opinions drown out your own inner voice.

Courage isn't having the strength to go on - it is going on when you don't have strength.

The first qualification of a soldier is fortitude under fatigue and privation. Courage is only the second; hardship, poverty, and want are the best school of the soldier.

Life at its noblest leaves mere happiness far behind; and indeed cannot endure it. Happiness is not the object of life: life has no object: it is an end in itself; and courage consists in the readiness to sacrifice happiness for an intenser quality of life.