Respect for other life forms
Progressing age does not come with many positives except perhaps that one gains some perspective.
I live in the present and feel like the same usual me day to day, so I do not frequently think about the past. But, on occasion, something reminds me of how things used to be. Much to my own astonishment, it has already been 35 years since I started diving. When I look at old photographs, I usually have the same two initial reactions.