I don't know whether doing good deeds adds to longevity or not, but doing good deeds feel pretty OK. Once gave a teddy bear to a teenager at an accident scene. She clutched that thing like it was her grasp on reality, and maybe for that space of time it was. Her mom met me on the street weeks later and told me she'd named it after me. Truthfully, I couldn't recall what the people at the scene looked like, nor did I remember the mother. However, it made my day and helped remind me that small things, workaday things to us may be seen as something very important by others.
Uh, Jerry, this thing about motes? Ain't they around castles?