If I take refuge in ambiguity, I assure you that it's quite conscious.
The ideal life is that which has few friends, but many acquaintances.
Fortunately science, like that nature to which it belongs, is neither limited by time nor by space. It belongs to the world, and is of no country and no age. The more we know, the more we feel our ignorance; the more we feel how much remains unknown.
Life is made up, not of great sacrifices or duties, but of little things, in which smiles and kindness, and small obligations given habitually, are what preserve the heart and secure comfort.
The most important of my discoveries have been suggested to me by failures.
Nothing is so dangerous to the progress of the human mind than to assume that our views of science are ultimate, that there are no mysteries in nature, that our triumphs are complete and that there are no new worlds to conquer.
I have learned more from my mistakes than from my successes.
A man preacheth that sermon only well unto others which preacheth itself in his own soul. And he that doth not feed on and thrive in the digestion of the food which he provides for others will scarce make it savoury unto them; yea, he knows not but the food he hath provided may be poison, unless he have really tasted of it himself. If the word do not dwell with power in us, it will not pass with power from us.
Men who have lost their conviction of what is good and what is bad find themselves without a sextant to check their position by. We are in the position of a man with an elaborate camping kit who finds himself lost in the woods without his matches; to kindle a fire he has to resort to the stratagems of the caveman. We fall back through generations into the oldest terrors and confusions of the race.
The hero is the person who's afraid to run away.
Congress should ban advertising that preys upon children, it should stop subsidizing dead-end jobs, it should pass tougher food safety laws, it should protect American workers from serious harm, it should fight against dangerous concentrations of economic power.