Believe you can and you're halfway there.

For us is the life of action, of strenuous performance of duty; let us live in the harness, striving mightily; let us rather run the risk of wearing out than rusting out.

Over-sentimentality, over-softness, in fact washiness and mushiness are the great dangers of this age and of this people. Unless we keep the barbarian virtues, gaining the civilized ones will be of little avail.

A man's usefulness depends on his living up to his ideals insofar as he can. It is hard to fail but it is worse never to have tried to succeed. All daring and courage, all iron endurance of misfortune, make for a finer, nobler type of manhood. Only those are fit to live who do not fear to die; and none are fit to die who have shrunk from the joy of life and the duty of life.

The most ultimately righteous of all wars is a war with savages.

There can be no life without change, and to be afraid of what is different or unfamiliar is to be afraid of life.

The great virtue of my radicalism lies in the fact that I am perfectly ready, if necessary, to be radical on the conservative side.