A corollary is there's a limit to what you can effectively care about. A big part of what makes us geeks is caring too much about the wrong things (according to normals anyway).
> A corollary is there's a limit to what you can effectively care about. In absolute terms, maybe, I'm not sure. But in relative terms, by definition, there is a limit to what you can care about. Care more about your job than your kids, that's a problem. Care more about your friends than your spouse at a time when they need your support, that's a problem.
Check out Dunbar's Number (a.k.a. the monkeysphere).