Obedience will prove the truth of Jesus' teachings

Scripture reference

John 7:17 (ASV 1901)

17If any man willeth to do his will, he shall know of the teaching, whether it is of God, or whether I speak from myself.

Stories

George Müller, challenged to prove the truth of the Scriptures by obedience to them, was baptized as an adult, and after being a pastor for some time.