A letter Sirius writtes for Remus and Harry when he's sentenced to have the Dementor's kiss Slight Remus&Sirius implied, but only if you squint xD
Remus' view of his lycanthropy. "The secret side of me, I never let you see I keep it caged but I can't control it So stay away from me, the beast is ugly I feel the rage and I just can't hold it"