Science may set limits to knowledge, but should not set limits to imagination.
An understanding of the natural world is a source of not only great curiosity, but great fulfilment.
Intelligence is a moral category.
Wise men speak because they have something to say; Fools because they have to say something.
Experience keeps a dear school, but fools will learn in no other.
There's no sense in being precise when you don't even know what you're talking about.
Just remember, once you're over the hill you begin to pick up speed.
Achievement brings its own anticlimax.
Sometimes you will never know the value of a moment until it becomes a memory.
No act of kindness, no matter how small, is ever wasted.
Be curious, not judgmental.
Above all be of single aim; have a legitimate and useful purpose, and devote yourself unreservedly to it.
We sometimes congratulate ourselves at the moment of waking from a troubled dream; it may be so the moment after death.
Be sure you put your feet in the right place, then stand firm.
The most courageous act is still to think for yourself. Aloud.
Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.
By three methods we may learn wisdom: first, by reflection which is noblest; second, by imitation, which is the easiest; and third, by experience, which is the bitterest.
The place where you made your stand never mattered. Only that you were there...and still on your feet.
Good advice is always certain to be ignored, but that's no reason not to give it.
Better beggar woman and single than Queen and married.
Happiness is not an ideal of reason, but of imagination.