Everything excellent is as difficult as it is rare.

Most of us have far more courage than we ever dreamed possible

In order to change the world, you have to get your head together first

Science may set limits to knowledge, but should not set limits to imagination.

Better mad with the rest of the world than wise alone.

Those who know, do. Those that understand, teach.

Man's sensitivity to the little things and insensitivity to the greatest are the signs of a strange disorder.

Nothing is softer or more flexible than water, yet nothing can resist it.

What's done can't be undone.

Real knowledge is to know the extent of one's ignorance.

The experience gathered from books, though often valuable,is but the nature of learning whereas the experience gained from actual life is of the nature of wisdom.

Empty pockets never held anyone back. Only empty heads and empty hearts can do that.

Drop the idea of becoming someone, because you are already a masterpiece. You cannot be improved. You have only to come to it, to know it, to realize it.

Stubborn and ardent clinging to one's opinion is the best proof of stupidity.

The secret of life, though, is to fall seven times and to get up eight times.

Turn your wounds into wisdom.

If you would take, you must first give, this is the beginning of intelligence.

Never do anything when you are in a temper, for you will do everything wrong.

Nothing fixes a thing so intensely in the memory as the wish to forget it.

The only real mistake is the one from which we learn nothing.

To avoid criticism say nothing, do nothing, be nothing.