Experience keeps a dear school, but fools will learn in no other.
Never pick a fight with an ugly person, they've got nothing to lose.
Appearances often are deceiving.
If we don't believe in freedom of expression for people we despise, we don't believe in it at all.
We seldom realize, for example that our most private thoughts and emotions are not actually our own. For we think in terms of languages and images which we did not invent, but which were given to us by our society.
If you're happy, don't worry you'll get over it.
Without courage, wisdom bears no fruit.
And this sensitivity will create new friendships for you - friendships with trees, with birds, with animals, with mountains, with rivers, with oceans, with stars. Life becomes richer as love grows.
When you dance, your purpose is not to get to a certain place on the floor. It's to enjoy each step along the way.
For beautiful eyes, look for the good in others; for beautiful lips, speak only words of kindness; and for poise, walk with the knowledge that you are never alone.
A wise man can learn more from a foolish question than a fool can learn from a wise answer.
Convictions are more dangerous enemies of truth than lies.
What's done can't be undone.
Experience teaches us that it is much easier to prevent an enemy from posting themselves than it is to dislodge them after they have got possession.
I wanted to change the world. But I have found that the only thing one can be sure of changing is oneself.
The very essence of instinct is that it's followed independently of reason.
The greatest deception men suffer is from their own opinions.
To a wise and good man the whole earth is his fatherland.
One new feature or fresh take can change everything.
Whatever it is you're seeking won't come in the form you're expecting.
An understanding of the natural world is a source of not only great curiosity, but great fulfilment.