Re: What goes around, comes around!
In Islam, it is said that one should avoid hurting others because the dua of the one who is hurt/oppressed is NEVER rejected by Allah. And this warning alone emphasizes the concept of "what goes around comes around."
Narrated Abu Ma'bad, that the Prophet said, **"... and be afraid of the curse of an oppressed person because there is no screen/barrier between his invocation (dua) and Allah." **Sahih Bukhari: Volume 2, Book 24, Number 573.
I know that when I've treated others wrong in the past, I eventually got my payback. I've also seen other people get slapped in the face by karma for their wrong-doings.
I know that it's hard to do...but it's best to apologize/seek forgiveness of the people you've hurt **OR **at least make dua for the one you've wronged.