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"I've spent quality time in the aerospace community, with my service on two presidential commissions, but at heart, I'm an academic. Being an academic means I don't wield power over person, place or thing. I don't command armies; I don't lead labor unions. All I have is the power of thought."
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"There are no new inventions, only new discoveries."
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Personal Development
"The only gift to yourself is your ability to seek knowledge."
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Personal Development
"Ignorance is the darkest depths."
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Personal Development
"Every book has to wait for the right time to be read and understood."
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Personal Development
"Devote yourself to reading of Scriptures."
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Personal Development
"There is only a perspective seeing, only a perspective "knowing"; and the more affects we allow to speak about one thing, the more eyes, different eyes, we can use to observe one thing, the more complete will our "concept" of this thing, our "objectivity," be."
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Personal Development
"Life is all about discovery."
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Personal Development
"Knowledge is as infinite as the universe. The man who claims to know all, only reveals to all that he really knows nothing."
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Personal Development
"Knowledge is invariably a matter of degree: you cannot put your finger upon even the simplest datum and say this we know."
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Personal Development
"Science is a proven concept with standards. Wisdom is the knowledge of life that we learn by living it."
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Personal Development
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"While I'm a big fan of science fiction, especially as rendered in expensive Hollywood blockbusters, it's the real universe that calls to me."
Science
"The more I learn about the universe, the less convinced I am that there's any sort of benevolent force that has anything to do with it, at all."
Philosophy
"When scientifically investigating the natural world, the only thing worse than a blind believer is a seeing denier."
Science
"I don't know anybody who said, 'I love that teacher, he or she gave a really good homework set,' or 'Boy, that was the best class I ever took because those exams were awesome.' That's not what people want to talk about. It's not what influences people in one profession or another."
Education
"If you want a nation to have space exploration ambitions, you've got to send humans."
Science
"While the Copernican principle comes with no guarantees that it will forever guide us to cosmic truths, it's worked quite well so far: not only is Earth not in the center of the solar system, but the solar system is not in the center of the Milky Way galaxy, the Milky Way galaxy is not in the center of the universe, and it may come to pass that our universe is just one of many that comprise a multiverse. And in case you're one of those people who thinks that the edge may be a special place, we are not at the edge of anything either."
Science
"Passion is what gets you through the hardest times that might otherwise make strong men weak, or make you give up."
Motivation
"Some molecules - ammonia, carbon dioxide, water - show up everywhere in the universe, whether life is present or not. But others pop up especially in the presence of life itself. Among the biomarkers in Earth's atmosphere are ozone-destroying chlorofluorocarbons from aerosol sprays, vapor from mineral solvents, escaped coolants from refrigerators and air conditioners, and smog from the burning of fossil fuels. No other way to read that list: sure signs of the absence of intelligence."
Science
"Curious that we spend more time congratulating people who have succeeded than encouraging people who have not."
Motivation
"There's a lot to do in space. I want to learn more about the greenhouse effect on Venus, about whether there was life on Mars, about the environment in which Earth and the Sun is immersed, the behavior of the Sun."
Science
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