I've read in interviews that it was tough to record because they had a hard time keeping Ozzy from screaming "COCAINE!" as loud as he could at the end of every single verse.
Mirror, mirror on the wall
The face you've shown me scares me so
I thought that I could call your bluff
But now the lines are clear enough
Life's not pretty even though
I've tried so hard to make it so
Mornings are such cold distress
How did I ever get into this mess