Devil

Dear Devil:
Why do you put these thoughts in my head?
Will you torment me long after I'm dead?
Are you the one that makes my dwell on regret?
Do you take away my money; leaving me in debt?
Are you under my bed; keeping me awake?
Are you the whispers I hear telling me I'm the mistake?
Dear Devil, the thing I really must know...
Do you really exist, or am I my own foe?