We now have in our hands—really, in our libraries—the technology to feed, clothe, and supply energy to an ever-growing population for the next seven billion years.

The main fuel to speed the world's progress is our stock of knowledge, and the brake is our lack of imagination.

People call me an optimist, but I'm really an appreciator ... years ago, I was cured of a badly infected finger with antibiotics when once my doctor could have recommended only a hot water soak or, eventually, surgery.... When I was six years old and had scarlet fever, the first of the miracle drugs, sulfanilamide, saved my life. I'm grateful for computers and photocopiers ... I appreciate where we've come from.

The world's problem is not too many people, but lack of political and economic freedom.

Letting the religious right teach ID in schools is like letting the Marines teach poetry in advanced combat training. As a scientist, I see these the relevancy between the two sets to be equal. If Kansas is going to mess up like this, the least it can do is not be hypocritical and allow equal time for other alternative "theories" like FSMism, which is by far the tastier choice.

Energy is the master resource, because energy enables us to convert one material into another. As natural scientists continue to learn more about the transformation of materials from one form to another with the aid of energy, energy will be even more important.

There is only one important resource which has shown a trend of increasing scarcity rather than increasing abundance. That resource is the most important of all—human beings. . . . [An] increase in the price of peoples’ services is a clear indication that people are becoming more scarce even though there are more of us.