He wishes to purge himself of all feelings, to cleanse his mind, soul, and heart until he is blank. "I'd write a letter to you and there'd be nothing to it" perhaps about writing a letter to a lover and not caring anymore. "I pray my soul to sleep I wish myself away" are lines maybe about sleeping or dying? In some way, losing consciousness and conscious feeling.
He wishes to purge himself of all feelings, to cleanse his mind, soul, and heart until he is blank. "I'd write a letter to you and there'd be nothing to it" perhaps about writing a letter to a lover and not caring anymore. "I pray my soul to sleep I wish myself away" are lines maybe about sleeping or dying? In some way, losing consciousness and conscious feeling.