His central teachings, that the Bible is the central source of spiritual authority and that deliverance is reached through faith and not doing, shaped the nature of Protestantism.
Luther and other Reformers reasserted the power of the Scripture unaided, as opposed to practice and church hierarchy. They maintained that redemption comes by grace alone, through faith alone, in Christ independently, to the glory of God alone.
To learn more about Luther's belief, refer
https://brainly.com/question/885736
#SPJ4