There are dangers, but only dangers if people don't understand where technology is taking us.

The media, of course, loves to make claims about the fountain of youth. Don't believe it. No one has it. But we're getting close.

What do oil company executives, vampires and NASA bureaucrats all have in common? They fear solar energy.

...the laws of physics, carefully constructed after thousands of years of experimentation, are nothing but the laws of harmony one can write down for strings and membranes. The laws of chemistry are the melodies that one can play on these strings. the universe is a symphony of strings. And the "Mind of God," which Einstein wrote eloquently about, is cosmic music resonating throughout hyperspace.

To become a theoretical physicist ... you need to have a passionate love affair with the universe.

String theory is based on the simple idea that all the four forces of the universe: gravity, the electromagnetic force and the two nuclear forces, can be viewed, as music.

I vowed to myself that when I grew up and became a theoretical physicist, in addition to doing research, I would write books that I would have liked to have read as a child. So whenever I write, I imagine myself, as a youth, reading my books, being thrilled by the incredible advances being made in physics and science.