Authority Of Scripture
"Do not think that I came to abolish the Law or the Prophets; I did not come to abolish but to fulfill. "For truly I say to you, until heaven and earth pass away, not the smallest letter or stroke shall pass from the Law until all is accomplished. "Whoever then annuls one of the least of these commandments, and teaches others to do the same, shall be called least in the kingdom of heaven; but whoever keeps and teaches them, he shall be called great in the kingdom of heaven.
In John 8:47, Jesus identifies his own teaching with the "words of God" and insists that anyone who is "of God" will hear and obey them.
Unless I am convinced by the testimonies of the Holy Scriptures or evident reason (for I believe in neither the Pope nor councils alone, since it has been established that they have often erred and contradicted themselves), I am bound by the Scriptures that I have adduced, and my conscience has been taken captive by the Word of God; and I am neither able nor willing to recant, since it is neither safe nor right to act against conscience. God help me. Amen. - Martin Luther (WA, 7, 836-38.)
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By Scripture
Old Testament