My T has mentioned some of his difficult life experiences (a parent's death) so I know he has gone through some stuff I haven't yet.
The older I get, the more it becomes clear that everybody has probably gone through some hard times, and if they haven't, they will someday. It makes me feel a lot more sympathetic to people than I used to. There are some experiences that are hard to "get" from outside, but I try to respect people who have dealt with those things even if I can't fully comprehend it.