If you don't contradict yourself on a regular basis, then you're not thinking.

The answer is that we are not helpless in the face of our first impressions. They may bubble up from the unconscious - from behind a locked door inside of our brain - but just because something is outside of awareness doesn't mean it's outside of control.

Our intuitions, as humans, aren't always very good. Changes that happen really suddenly, on the strength of the most minor of input, can be deeply confusing.

Of the great entrepreneurs of this era, people will have forgotten Steve Jobs.

Living a long life, the conventional wisdom at the time said, depended to a great extent on who we were-that is, our genes. It depended on the decisions we made-on what we chose to eat, and how much we chose to exercise, and how effectively we were treated by the medical system. No one was used to thinking about health in terms of community.

Did they know why they knew? Not at all. But the Knew!

Incompetence is certainty in the absence of expertise. Overconfidence is certainty in the presence of expertise.