As great as Luther is, he didn’t go back to the Bible.
"We may trust unconditionally only in the Word of God and not in the teaching of the fathers; for the teachers of the Church can err and have erred. Scripture never errs. Therefore it alone has unconditional authority. The authority of the theologians of the Church is relative and conditional. Without the authority of the words of Scripture, no one can establish hard and fast statements in the Church." ~ Martin Luther
“Unless therefore I am convinced by the testimony of Scripture, or by the clearest reasoning, unless I am persuaded by means of the passages I have quoted, and unless they thus render my conscience bound by the Word of God, I cannot and will not retract, for it is unsafe for a Christian to speak against his conscience. Here I stand, I can do no other; may God help me! Amen!” ~ Martin Luther
Though Luther wasn't revolutionary in this, of course:
“Have thou ever in your mind this seal, which for the present has been lightly touched in my discourse, by way of summary, but shall be stated, should the Lord permit, to the best of my power with the proof from the Scriptures. For concerning the divine and holy mysteries of the Faith, not even a casual statement must be delivered without the Holy Scriptures; nor must we be drawn aside by mere plausibility and artifices of speech. Even to me, who tell you these things, give not absolute credence, unless thou receive the proof of the things which I announce from the Divine Scriptures. For this salvation which we believe depends not on ingenious reasoning , but on demonstration of the Holy Scriptures.” (Cyril of Jerusalem, Cat. Lecture 4, Ch. 17)