Creativity is a double-edged sword. When channelled by a clear and compelling vision, it can create positive, constructive and amazing output.
When not directed by a purpose or cause, it can manifest doubt, festering worries and dark monsters.
Come to think of it, self awareness is also of a similar vein.
There is a recent Daily Good article on the link between curiosity and worrying. Our brains are wired to come up with worst case scenarios. Does this mean creative people are more prone to depression?