"Life is a struggle, but not a warfare."

"I can't say this enough, I'm totally comfortable with my body. I like my body, I don't think it's a bad thing, I think I have a nice body, I'm happy with it."

"I'm living my life as a journey. My quest is to make it better every year."

"Everything's a risk, by the way, these days. Every film you make is a risk. There's no guarantee."

"To me, that's the wealth of my life: my friends and family and the experience I get to share with them."

"Tell me what gives a man or woman their greatest pleasure and I'll tell you their philosophy of life."

"I've pretty much behaved like a knucklehead my entire life."

"Take a chance! All life is a chance. The man who goes farthest is generally the one who is willing to do and dare."

"Today is life-the only life you are sure of. Make the most of today. Get interested in something. Shake yourself awake. Develop a hobby. Let the winds of enthusiasm sweep through you. Live today with gusto."

"Take a chance! All life is a chance. The man who goes the furthest is generally the one who is willing to do and dare. The “sure thing” boat never gets far from shore."

"I'm not looking for a husband or marriage or not not looking for that stuff. I'm living, not thinking what I should or shouldn't be doing with my life."

"One of the great things about being an actor is that you do get to indulge in someone else's life."

"I know that in my life my girlfriends are one of the most important relationships I have going through the good times and the bad times."

"It's such a commitment, making a film, you're really dedicated, it's your life, that's all you do for that period of your life."

"Mars, we know, was once wet and warm. Was it home to life? And what can living and learning to work on its rust-colored surface teach us about the future of our own planet, Earth? Answering those mysteries may hold the key to our future."

"Just as Mars - a desert planet - gives us insights into global climate change on Earth, the promise awaits for bringing back to life portions of the Red Planet through the application of Earth Science to its similar chemistry, possibly reawakening its life-bearing potential."

"I've led a life of such structured discipline and always had a goal in mind of knowing what I was doing, from West Point to the Air Force combat, MIT, looking for new things to study and get involved in. And then I got into the space program, and how disciplined can you get?"

"There may be aliens in our Milky Way galaxy, and there are billions of other galaxies. The probability is almost certain that there is life somewhere in space."

"I think humans will reach Mars, and I would like to see it happen in my lifetime."

"I didn't start skiing until I was 50. My wife Lois taught me how to ski. I'm proficiently conservative."

"When I was a little kid, we only knew about our nine planets. Since then, we've downgraded Pluto but have discovered that other solar systems and stars are common. So life is probably quite prevalent."

"There's a need for accepting responsibility - for a person's life and making choices that are not just ones for immediate short-term comfort. You need to make an investment, and the investment is in health and education."

"Timing has always been a key element in my life. I have been blessed to have been in the right place at the right time."

"The life expectancy of people going to Mars may be decreased by the higher level of radiation that they receive."