‘Two halves of one apple’ in Polish language is a commonly used saying to describe soulmates. It brings to minds the Platonic myth of Aristophanes which explains the origins of humans – eight-limbed creatures who grew so powerful Zeus had to spilt them in half and since then they live on Earth constantly seeking the wholeness they had lost.
'Human beings were once composite creatures that were both male and female. Each being had one head with two faces, four hands and four feet, and both male and female genitals. Being united and whole, our ancestors wielded tremendous force. In fact, so magnificent were these androgynous beings that they dared to attack the gods. The gods, of course, would not tolerate this insolence, but they didn’t know how to punish the humans. “If we kill them” they said to one another “there will be no-one to worship us and offer us sacrifices”. Zeus pondered the situation and finally came up with a solution: “Men shall continue to exist”, he decreed, “but they will be cut in two, then they will be diminished in strength so we need not to fear them.” Zeus proceeded to split each being in two, asking Apollo ’s help to make the wounds invisible. The two halves were then sent in opposite directions to spend the rest of their lives searching frantically for the other half-creature, the reunion.'