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"The United States has long thought of itself as the land of infinite plenty, and historically we did have abundant resources. But now we are gradually exhausting our fisheries, our topsoil, our water. On top of that, we're coming to the end of world resources."
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"When you take action-think.When you fail-think.When you are in doubt-think.When you have lost your way-think.You are nothing but your thoughts."
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Personal Development

"Wherever your thoughts and beliefs can take you, you can go there."
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Personal Development

"Give thy thoughts no tongue."
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Personal Development

"Of course, in our train of thought, we would all like to think we're on the right track, or at least the same railroad company as the right track."
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Personal Development

"The moment comes when a character does or says something you hadn't thought about. At that moment he's alive and you leave it to him."
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Personal Development

"Doubt isn't original."
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Personal Development

"One great use of words is to hide our thoughts."
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Personal Development

"Those 'back burner' thoughts, the ones the brain isn't quite sure about yet, may cook the slowest yet they often manage to be the tastiest when they come out."
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Personal Development

"The survival of poor opinions can make a thinker feel as though he is failing humanity."
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Personal Development

"Never underestimate the power of a simple thought."
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Personal Development
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"I'd rather spend my leisure time doing what some people call my work and I call my fun."
Time

"Infectious diseases introduced with Europeans, like smallpox and measles, spread from one Indian tribe to another, far in advance of Europeans themselves, and killed an estimated 95% of the New World's Indian population."
Society

"We study the injustices of history for the same reason that we study genocide, and for the same reason that psychologists study the minds of murderers and rapists... to understand how those evil things came about."
History

"Biology is the science. Evolution is the concept that makes biology unique."
Science

"The broadest pattern of history - namely, the differences between human societies on different continents - seems to me to be attributable to differences among continental environments, and not to biological differences among peoples themselves."
History

"I've always been interested in a lot of things, and a lot of things at the same time, and I always tried to explain them to myself. I ask a lot of questions."
Time

"Measles and TB evolved from diseases of our cattle, influenza from a disease of pigs, and smallpox possibly from a disease of camels. The Americas had very few native domesticated animal species from which humans could acquire such diseases."
Society

"The United States has long thought of itself as the land of infinite plenty, and historically we did have abundant resources. But now we are gradually exhausting our fisheries, our topsoil, our water. On top of that, we're coming to the end of world resources."
Thought

"Technology causes problems as well as solves problems. Nobody has figured out a way to ensure that, as of tomorrow, technology won't create problems. Technology simply means increased power, which is why we have the global problems we face today."
Technology

"Why did human development proceed at such different rates on different continents for the last 13,000 years?"
Development
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