The important thing is not to stop questioning. Curiosity has its own reason.

I never think of the future. It comes soon enough.

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

Imagination is more important than knowledge. Knowledge is limited.

We strove for more than 60 years to give Joe DiMaggio the hero's life. From his debut at Yankee Stadium in 1936 until his death in 1999, DiMaggio was, at every turn, one man we could look at who made us feel good.

One life is all we have and we live it as we believe in living it. But to sacrifice what you are and to live without belief, that is a fate more terrible than dying.

In our world of sleek flesh and collagen, Botox and liposuction, what we most fear is the dissolution of the body-mind, the death of the brain.

If there can be three certain things in life, instead of two, it might be death, taxes, and data.