Yeah, I actually mean mortality. You know how kids do reckless things (skateboarding without a helmet, driving too fast, jumping off things, I don't know) and their parents are like "OMG YOU COULD GET KILLED!!" and it just never seems to sink in? I used to love horror movies as a teenager because I felt very detached from them--that's a great special effect, that's ridiculous, that's funny, etc. I watch them now and I tend to see past that and think about actual suffering, how awful it would be if it happened to me or someone I cared about, etc. And I think the difference is that I understood mortality intellectually, but I didn't feel it. And when it really sinks in that you could die, you also look at other people and realize that they could die, too. That's where a certain kind of empathy comes in.