No mistake is more to be deplored than the conception that a system of morals and religion should derive any portion of its authority either from the circumstance of its novelty or its antiquity, that it should be judged excellent, not because it is reasonable or true, but because no person has ever thought of it before, or because it has been thought of from the beginning of time.
I came to America because of the great, great freedom which I heard existed in this country. I made a mistake in selecting America as a land of freedom, a mistake I cannot repair in the balance of my lifetime.
There are times where I've made mistakes or our administration hasn't always aligned ourselves with the values we need to align ourselves with. It's a work of constant improvement.
All courses of action are risky, so prudence is not in avoiding danger (it's impossible), but calculating risk and acting decisively. Make mistakes of ambition and not mistakes of sloth. Develop the strength to do bold things, not the strength to suffer.
Through error you come to the truth! I am a man because I err! You never reach any truth without making fourteen mistakes and very likely a hundred and fourteen.
I can't accept "our nervous age," since mankind has been nervous during every age. Whoever fears nervousness should turn into a sturgeon or smelt; if a sturgeon makes a stupid mistake, it can only be one: to end up on a hook, and then in a pan in a pastry shell.
Most persons are so absorbed in the contemplation of the outside world that they are wholly oblivious to what is passing on within themselves. The premature death of millions is primarily traceable to this cause. Even among those who exercise care, it is a common mistake to avoid imaginary, and ignore the real dangers. And what is true of an individual also applies, more or less, to a people as a whole.