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

The purposeful destruction of information is the essence of intelligent work.

Find your passion, learn how to add value to it, and commit to a lifetime of learning.

It is doubling now every two years. Doubling every two years means multiplying by 1,000 in 20 years. At that rate we'll meet 100 percent of our energy needs in 20 years.

Take death for example. A great deal of our effort goes into avoiding it. We make extraordinary efforts to delay it, and often consider its intrusion a tragic event. Yet we'd find it hard to live without it. Death gives meaning to our lives. It gives importance and value to time. Time would become meaningless if there were too much of it.

As you go out to the 2040s, now the bulk of our thinking is out in the cloud. The biological portion of our brain didn't go away but the nonbiological portion will be much more powerful. And it will be uploaded automatically the way we back up everything now that's digital.

Humans feel deeply the suffering of their friends and allies and easily discount/dismiss the comparable experience of their enemies.