What Luther saw as his reflection in that mirror was not the pale and pious representation of men's inherent goodness, but the face of a sinner, broken and weary and ultimately consumed with gratitude for the free, merciful gift of Christ's righteousness within him.
"The human will is placed between God and Satan like a beast of burden. If God rides it, it wills and goes where God wills; if Satan rides it, it wills and goes where Satan wills. Nor can it choose to run to either of the two riders, but the riders themselves contend for the possession of the beast." -- Martin Luther, "On the Bondage of the Will."One wonders why they hate Luther so much
Luk 6:22 Blessed are ye, when men shall hate you, and when they shall separate you [from their company], and shall reproach [you], and cast out your name as evil, for the Son of man's sake.