It is a peculiar thing amongst humans that we embody both the demon and the angel.
We see in the stories of fallen politicians, civic leaders and philanthropists that otherwise 'good' people may have very dark sides.
In fact we all have the dark that matches the light. That is the balance of the human psyche, and those claim to not are simply fooling themselves (poorly) and attempting to fool the rest of us with a facade of a saint that is a sallow one when compared to the rich tapestry of humanity.
We all embody both the potential for Dr Jekyll and Mr Hyde, and we struggle and battle to live the life of an angel, and sometimes succumb just a little to the devil.
That is the way and it is another call to action and a reminder to, in the words of Philo; "Be kind, for everyone is fighting a great battle..." and for us all, at the very root of it, the battle is the same...