The thing I love about riding is that it gets me out into the world. I feel like I'm a part of everything that's oging on when I'm riding. After this ride, though, i just wanted to stay inside and never leave.
Fortunately, that feeling is most likely transient. The sadness will disappear, but hopefully I can retain whatever lesson/moral/significance there is to be had from all of this. Maybe I can help my friend, maybe I can influence some other cyclists to wear helmets after hearing this story. If either of those things happen, then some good will have come out of it.