Does everyone have a soul mate? Better yet, what is a soul mate? It depends on how you define a soul mate...  The Greek philosopher Aristophanes first coined the idea of a race of soul mates. Instead of two individuals who loved each other, his soul mate had four arms, four legs, and two faces. They were two humans united as one. They had one mind, one purpose, and one soul. In each other they found complete happiness and had no need for anything or anyone else, especially the gods. Zeus, the head god, split the soul mates asunder with a thunderbolt.