Why did Eminem had to talk about darkness

I thought I owned that element

Always staying an inch away from madness

Insecurities, weaknesses and loneliness

I'm sleepless and insomnia's telling this

I took up more monsters than I was supposed to handle at a time

I wish I could destroy them with some good rhyme

Or a therapist who didn't charge for their time

Oh, what am I saying, I know I'm normal as you

I just look into the darkness once in a while to see if its true

That if you can fake it till you make it then there's no issue

But I shed tears for no reason, needed a tissue

My mind don't accept my personality it wanna be a Mary Sue

I'm crashing and burning, but there's some light too, at the next turn

The damage is irreversible and hurtful, the pain feels like a burn

Just need to survive this night for the brighter day that's yet to come