[Avodah] No apologies, just a kiss

[cantorwolberg]

 From where did we get the *concept* of apology or forgiveness, among
people?

I would argue that we get the concept of apology or forgiveness from Vayikra 19:18.
V’ahavta l’rey-echa kamocha

As I would want others to forgive me, so, too, I should forgive others.
Regarding apologies, that is just plain derech eretz. 

I’m reminded of a pet peeve I have. When I am driving and let someone by as a courtesy,
I expect the person to wave a sign of thanks. When that doesn’t happen, it irks me. I can’t imagine someone letting me go in front of them and not waving a gesture of thanks.