If Jesus is God (and in recent lessons have concluded from evidence that He is), then He is perfectly moral, because God is perfectly moral. If Jesus is perfectly moral, then He can speak no lies. Since He cannot speak lies, anything that Jesus teaches is true. Since the New Testament is historically reliable and accurately records the deeds and teachings of Jesus, then what it says about what Jesus teaches must be true. So, examining teachings of Jesus recorded in the New Testament, we can examine what Jesus taught about the Bible, and have an understanding of whether or not the Bible is truly the Word of God.