At some point most of us that delves deep into the unknown of our character and there we face a darker side of ourselves. In Jungen words the Shadow. We can manifest the Shadow in different ways depending on how we like to deal with it.

The more we dig deeper into the darker side of your personality the more we learn of its characteristics. Either we aim for slaying the dragon and harness its powers(fusing with the shadow). Or we can become the dragon itself and bring out destruction in the world through our darker self.
I think in many ways it is very important to face your own Shadow to learn the whole side of yourself. Because if we are not aware of what brings out the Shadow in us, it will act on its own when you least expect it.

I myself have battled with my Shadow personality for years and I think many people do but finding the right way to infuse it can be challenging. But the more we know the better we can handle it like most things in life.

Like a coin, it has two sides but if you flick it making it spin in the direction you want both sides will be present in just the right amount.