what goes around comes around

What goes around comes around is a phrase that means that the status of something eventually returns to its original value after completing the same sort of cycle. For instance, if you do something to someone else, good or bad, it will most likely come back to you in the same manner. This is used most often in the negative, such as describing the way that if you do something bad to someone else, they might come back and do the same bad thing to you.