A MAN IS A DEVIL TO ANOTHER MAN.
From ancient myths to old Grandma stories, we were told by our ancestors that a monster or some supernatural evil, being a dead-end to a person's happy life.
We always feared of a ghost which might pop up under our bed, that actually never existed; we feared for a monster that might attack us during night, when we walk home alone.
They were all just some bind stories, which made us hug our moms tight at night, made us walk in groups instead of going alone in empty streets and even, just a thought of staying alone at home gave as chills.
There might or might not be such things existed, but still a greed of a man is much more worse than a deadly monster.
Beyond science and superstitions, there is something undefeatable in nature, which is the obstinacy in a human mind.