A good engineer gets stale very fast if he doesn't keep his hands dirty.
All one can really leave one's children is what's inside their heads. Education, in other words, and not earthly possessions, is the ultimate legacy, the only thing that cannot be taken away.
Don't tell me that man doesn't belong out there. Man belongs wherever he wants to go- and he'll do plenty well when he gets there.
Everything in space obeys the laws of physics. If you know these laws, and obey them, space will treat you kindly.
I believe in an immortal soul. Science has proved that nothing disintegrates into nothingness. Life and soul, therefore, cannot disintegrate into nothingness, and so are immortal.
I have learned to use the word 'impossible' with the greatest caution.
I'm convinced that before the year 2000 is over, the first child will have been born on the moon.
If our intention had been merely to bring back a handful of soil and rocks from the lunar gravel pit and then forget the whole thing, we would certainly be history's biggest fools.
It takes sixty-five thousand errors before you are qualified to make a rocket.
Looking back, nothing seems so simple than a utopian vision realized.
Man belongs wherever he wants to go.
Man is the best computer we can put aboard a spacecraft... and the only one that can be mass produced with unskilled labor.
My experiences with science led me to God. They challenge science to prove the existence of God. But must we really light a candle to see the sun?
Nature does not know extinction; all it knows is transformation. Everything science has taught me, and continues to teach me, strengthens my belief in the continuity of our spiritual existence after death.
One good test is worth a thousand expert opinions.
Our sun is one of a 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living thing in that enormous immensity.
Our two greatest problems are gravity and paper work. We can lick gravity, but sometimes the paperwork is overwhelming.
Research is what I'm doing when I don't know what I'm doing.
Science and religion are not antagonists. On the contrary, they are sisters. While science tries to learn more about the creation, religion tries to better understand the Creator. While through science man tries to harness the forces of nature around him, through religion he tries to harness the force of nature within him.
Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.
The greatest gain from space travel consists in the extension of our knowledge. In a hundred years this newly won knowledge will pay huge and unexpected dividends.
There is just one thing I can promise you about the outer space program: your tax dollars will go farther.
We can lick gravity, but sometimes the paperwork is overwhelming.
What we will have attained when Neil Armstrong steps down upon the moon is a completely new step in the evolution of man.
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