Art is the expression of the profoundest thoughts in the simplest way.

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 universe is flux, life is opinion.

Tingling fingers, morning birds, rain splatters on window pane, journals of fading escapades and laughter...

I never kept a diary, but I wrote detailed notes of my travels.

Because it's there. (when asked why he wanted to climb Everest)

President Reagan's one-liners were terrific.

I am basically working 7 days a week. When I am not eating, sleeping, or working out, I am working on one of projects which I am just damned determined to finish.

I'm not one to go on blogs and things like that, but we do have our own personal Twitter profiles, so we get a lot of tweets, and they are pretty passionate. It's fun. I like it.

Now we notice that Mars doesn't have any atmosphere either and won't support life. In spite of the fact that it turns green and red and purple with the seasons, it doesn't support life.

I do not watch television. But I'm in touch with the world. If anything really important happens, someone will tell me.

But he does look stupid.' Yearning. Not stupid. He wants awfully to be on the inside staring out: anybody with their nose pressed against a glass is liable to look stupid.