There is no logical way to the discovery of these elemental laws. There is only the way of intuition, which is helped by a feeling for the order lying behind the appearance.

Gravitation is not responsible for people falling in love.

Life is like riding a bicycle. To keep your balance, you must keep moving.

Life isn't worth living, unless it is lived for someone else.

Imagination is everything. It is the preview of life's coming attractions.

Wisdom is not a product of schooling but of the lifelong attempt to acquire it.

Strive not to be a success, but rather to be of value.

The true sign of intelligence is not knowledge but imagination.

God is clever but not dishonest.

Try not to become a man of success but rather a man of value.

Weakness of attitude becomes weakness of character.

The forty days of the soul begin on the morning after death.

Few men speak humbly of humility, chastely of chastity, skeptically of skepticism.

Never blame anyone for your life. You are responsible for you.

Alcohol, taken in sufficient quantities, may produce all the effects of drunkenness.

What I like about graduation speeches is that they're an opportunity for someone to make sense of their life and to impart that wisdom to someone else. It's like a sanctioned self-help moment.

You shouldn't do science just to improve wealth - do science for the sake of human culture and knowledge. There must be some purpose in life that is higher than just surviving.

The best thing there is to do when there is temptation is run.

Microfinance recognizes that poor people are remarkable reservoirs of energy and knowledge

Reading is the basic springboard for learning. And books provide the liftoff. They are the great equalizer, opening up new worlds to everyone.

Whenever I go someplace I always buy something, collect something, to help me remember the trip. So I guess I collect mementos from my many travels.