Is it true that what comes around goes around?

Is it really the case that "what comes around goes around"? This phrase often implies a sense of karma or divine justice, where actions have consequences and those who do good will be rewarded, while those who do bad will face punishment. But is this really how the world works? Can we truly expect that every action we take, no matter how small or insignificant, will have a corresponding reaction? And if so, how can we be sure that the universe is fair and just in its distribution of rewards and punishments? It's a fascinating question that has been debated for centuries, and one that continues to captivate the minds of philosophers, theologians, and everyday people alike.