“Every mitzvah that a Jew does creates a good angel and every sin creates an evil one.  I never saw a whole angel created by the transgression of a Jew.  Every angel created by a sin is missing a limb.  The reason is because every Jew has an innate belief and faith in Hashem, and even if he slips and commits a sin, he immediately regrets his action, sighs, and is sorry what he has done.  These sighs have the power to maim the limbs of the resulting prosecuting angels.” ~ R’ Zushia of Anipoli zt”l as quoted in Torah Tavlin