That's your responsibility as a person, as a human being - to constantly be updating your positions on as many things as possible. And if you don't contradict yourself on a regular basis, then you're not thinking.

The Tipping Point is the biography of an idea, and the idea is very simple. It is that the best way to understand the emergence of fashion trends, the ebb and flow of crime waves, or, for that matter, the transformation of unknown books into bestsellers, or the rise of teenage smoking, or the phenomena of word of mouth, or any number of the other mysterious changes that mark everyday life is to think of them as epidemics. Ideas and products and messages and behaviors spread just like viruses do.

I'm in the storytelling business, and so you're always drawn to the unusual. And early on, I discovered that's the easiest way to tell stories... If you come up through a newspaper as I did, your whole goal is to get a story on the front page, and you only get something on the front page if it's unusual.

I'm someone who can provide an intellectual framework, but I can't tell people who are trying to sell Product X how to do that because I don't know, and I would be faking it if I attempted to step into that role.

If your parents are billionaires, that might actually be an obstacle to your own happiness and self-development. If you go to Oxford or Harvard, that might actually thwart your desire to graduate with a science or math degree.

It is those who are successful, in other words, who are most likely to be given the kinds of special opportunities that lead to further success. It’s the rich who get the biggest tax breaks. It’s the best students who get the best teaching and most attention. And it’s the biggest nine- and ten-year-olds who get the most coaching and practice. Success is the result of what sociologists like to call “accumulative advantage.

A book, I was taught long ago in English class, is a living and breathing document that grows richer with each new reading.