Erebus is not telling you that there is no fear to be had in the dark. He is not there to console you and say that everything is okay- that there won't be something frightening staring back at you from the shadows.
Erebus is the knowledge that there Will be something scary looking back at you, waiting to pounce. He is the acceptance of inevitability, of knowing that sometimes we do have enemis lurking just out of eyesight.
But that inevitability comes with faith.
Faith that no matter what happens, the world moves on. That the sun will set and the moon will wax and wane and continue its course. That our enemies in the dark will never be large enough or powerful enough to sway everything that we are.
Erebus is the push to give yourself over to being vulnerable. To relinquish control. And to have faith that we can handle whatever comes to us in the night.