Science is the century-old endeavor to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible.

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.

In humility, we find our true calling and our greatest honor.

It's hard to be humble, when you're as great as I am.

Meeting Australian mountaineer and author Tim Macartney-Snape when I was 16 in 1994 had a big impact on me. His ascent of Everest from sea to summit captured my imagination.

The noble lord is the Rupert of debate.

I didn't live in the world of disco or the world of the Eagles.

We've been socialized with these concepts of love, intimacy, that have no bearing on reality.

The kids in our classroom are infinitely more significant than the subject matter we teach.

I love animals. They give so much to you and demand so little. And you can trust them.

What women have achieved in the last 50 years, I wish men would have achieved in the last 100.

Too hot to handle, too cold to hold!