“The devil keeps man from good with a thousand machinations spewed from his belly, so that when a person sighs to do good, he pierces him with his shafts; and when he desires to embrace God with his whole heart in love, he subjects him to poisonous tribulations, seeking to pervert good work before God. And when a person seeks the viridity of virtue, the devil tells him that he does not know what he is doing, and he teaches him that he can set his own law for himself.” – Hildegard of Binden, in a letter to the Abbot, circa 1166