The tipping point is that magic moment when an idea, trend, or social behavior crosses a threshold, tips, and spreads like wildfire.

There is nothing more common than critics of journalists accusing them of practicing journalism. It is our function in the world to take things that are complicated and render them in a form that non-experts can follow and make sense of.

And my advice for college graduates is don't reflexively give money to your alma mater, something particular to Americans that I find extraordinary. Take Princeton, for example - it has more money on a per capita basis than any educational institution in the history of educational institutions. There is no scenario where it can spend all the money its endowment generates every year. If there is anyone who gives a single dollar to Princeton, they have completely lost their mind. I will say that without reservation.

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.

To be someone's best friend requires a minimum investment of time. More than that, though, it takes emotional energy. Caring about someone deeply is exhausting.

It takes ten thousand hours to truly master anything. Time spent leads to experience; experience leads to proficiency; and the more proficient you are the more valuable you'll be.

Does that mean we should give up? Probably. But there are two issues worth considering. The first is - is it really true that drugs destroy the integrity of the game?