Anyone who has ever scanned the bookshelves of a new girlfriend or boyfriend- or peeked inside his or her medicine cabinet- understands this implicitly; you can learn as much - or more - from one glance at a private space as you can from hours of exposure to a public face.

Insight is not a lightbulb that goes off inside our heads. It is a flickering candle that can easily be snuffed out.

Clear writing is universal. People talk about writing down to an audience or writing up to an audience; I think that's nonsense. If you write in a way that is clear, transparent, and elegant, it will reach everyone.

To become a chess grandmaster also seems to take about ten years. (Only the legendary Bobby Fisher got to that elite level in less than that amount of time: it took him nine years.) And what's ten years? Well, it's roughly how long it takes to put in ten thousand hours of hard practice. Ten thousand hours is the magic number of greatness.

Good writing does not succeed or fail on the strength of its ability to persuade. It succeeds or fails on the strength of its ability to engage you, to make you think, to give you a glimpse into someone else's head.

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?

If we think about emotion this way - as outside-in, not inside out - it is possible to understand how some people can have an enormous amount of influence over others. Some of us, after all, are very good at expressiing emotions and feelings, which means that we are far more emotionally contagious than the rest of us.