Verified answer

"Luther concluded that unredeemed human beings are dominated by Satan; Satan, as the prince of the mortal world, never lets go of what he considers his own unless he is overpowered by a stronger power, i.e. God. When God redeems a person, he redeems the entire person, including the will, which then is liberated to serve God. No-one can achieve salvation or redemption through their own choices—people do not choose between good or evil, because they are naturally dominated by evil, and salvation is simply the product of God dominating a person and forcibly turning them to good ends. Were it not so, Luther contended, God would not be omnipotent and would lack total sovereignty over creation, and Luther held that arguing otherwise was insulting to the glory of God. As such, Luther concluded that Erasmus was not actually a Christian."