Science has not yet mastered prophecy. We predict too much for the next year and yet far too little for the next 10.

We have an infinite amount to learn both from nature and from each other

The dreams of yesterday are the hopes of today and the reality of tomorrow.

The sky is the limit only for those who aren't afraid to fly!

The path of a cosmonaut is not an easy, triumphant march to glory. You have to get to know the meaning not just of joy but also of grief, before being allowed in the spacecraft cabin.

Many say exploration is part of our destiny, but it’s actually our duty to future generations and their quest to ensure the survival of the human species.

Problems look mighty small from 150 miles up.

I don't know what you could say about a day in which you have seen four beautiful sunsets.

To be the first to enter the cosmos, to engage, single-handed, in an unprecedented duel with nature—could one dream of anything more?

I don't know what you could say about a day in which you have seen four beautiful sunsets.

What was most significant about the lunar voyage was not that man set foot on the Moon but that they set eye on the earth.

If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.

For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.

We are all connected; To each other, biologically. To the earth, chemically. To the rest of the universe atomically.

As I stand out here in the wonders of the unknown at Hadley, I sort of realize there’s a fundamental truth to our nature, Man must explore . . . and this is exploration at its greatest.

Many say exploration is part of our destiny, but it’s actually our duty to future generations and their quest to ensure the survival of the human species.

As I stand out here in the wonders of the unknown at Hadley, I sort of realize there’s a fundamental truth to our nature, Man must explore . . . and this is exploration at its greatest.

Failure is not an option.

For those who have seen the Earth from space, and for the hundreds and perhaps thousands more who will, the experience most certainly changes your perspective. The things that we share in our world are far more valuable than those which divide us.

Failure is not an option.