Ray Kurzweil

No matter what problem you encounter, whether it's a grand challenge for humanity or a personal problem of your own, there's an idea out there that can overcome it. And you can find that idea.

By 2029, computers will have emotional intelligence and be convincing as people.

What we spend our time on is probably the most important decision we make.

When you hit your 40s, you begin to take notice of the effects of aging because people that you know begin to die of heart attacks and tumors, so we take notice of the effects of aging.

Well, I actually wrote her a letter a couple of days ago congratulating her. The tone I tried to convey in the letter is, look, you are a part of a great American historical process.

I'd date someone younger or older; age doesn't matter to me. Or looks, really - it's all about maturity.