No tree, it is said, can grow to heaven unless its roots reach down to hell. - Carl Jung

Just as man, as a social being, cannot in the long run exist without a tie to the community, so the individual will never find the real justification for his existence, and his own spiritual and moral autonomy, anywhere except in an extramundane principle capable of relativizing the overpowering influence of external factors. The individual who is not anchored in God can offer no resistance on his own resources to the physical and moral blandishments of the world. For this he needs the evidence of inner, transcendent experience which alone can protect him from the otherwise inevitable submersion in the mass.

Knowing your own darkness is the best method for dealing with the darknesses of other people.

"‎"...the sole purpose of human existence is to kindle a light in the darkness of mere being.