What does the saying mean what goes around comes around?

I am a firm believer in "What goes around, comes around." Every instance where I have done something wrong, it has come back on me at some point in time of my life. And when I say it comes back, it doesn't mean that it comes back the same way; somtimes worse. The safest bet is to make the best decision in every situation, while keeping others feelings in mind. You will see positive benefits eventually, which means that good luck will come. Just remember: people that do bad things will eventually get caught or burned sooner than later.