Please, don't think of it as currency or anything like that. Helping others is simply the right thing to do, more often than not. If you can.

[ He swings one of Sunday's hands as he starts walking them up the beach again. Accepting the compliment with a polite nod, he tries to move the conversation away from himself. ]

What happened to you, to make you fall from such a great height? You don't have to tell me.