Concepts
Advertising. Why I spend money on purchasing TV shows on DVD or from iTunes, rather than watching them for free on TV and why I'm much happier because of it.
Certainty. Why I instinctively distrust angry people who profess certainty about issues generally accepted to be complicated.
Clarity. Why I spend a lot of my time messing with mobile devices with silly operating systems, and why I'm an apologist for some of the people who make them.
Depression. Why suicide is often incomprehensible to people who are not depressed, with help from David Foster Wallace.
Facebook. Why I don't have a personal Facebook account.
Freedom. Why I do things for other people.
Giants. If I have seen a little further it is by standing on the shoulders of giants.