The march of invention has clothed mankind with powers of which a century ago the boldest imagination could not have dreamt.

The best way to predict the future is to create it.

Laughter and tears are both responses to frustration and exhaustion. I myself prefer to laugh, since there is less cleaning up to do afterward.

I’m positive that in 100 years much of what I take to be true today will be proved to be wrong， maybe even embarrassingly wrong， and I try really hard to identify what it is that I am wrong about today.

The true cost of oil isn't just the price per barrel—it's the environmental and social impact.