“I can do nothing on my own. As I hear, I judge; and my judgment is just, because I seek to do not my own will but the will of him who sent me.
“If I testify about myself, my testimony is not true. There is another who testifies on my behalf, and I know that his testimony to me is true. You sent messengers to John, and he testified to the truth. Not that I accept such human testimony, but I say these things so that you may be saved. He was a burning and shining lamp, and you were willing to rejoice for a while in his light. But I have a testimony greater than John’s. The works that the Father has given me to complete, the very works that I am doing, testify on my behalf that the Father has sent me. And the Father who sent me has himself testified on my behalf. You have never heard his voice or seen his form, and you do not have his word abiding in you, because you do not believe him whom he has sent.
“You search the scriptures because you think that in them you have eternal life; and it is they that testify on my behalf. Yet you refuse to come to me to have life. I do not accept glory from human beings. But I know that you do not have the love of God in you. I have come in my Father’s name, and you do not accept me; if another comes in his own name, you will accept him. How can you believe when you accept glory from one another and do not seek the glory that comes from the one who alone is God? Do not think that I will accuse you before the Father; your accuser is Moses, on whom you have set your hope. If you believed Moses, you would believe me, for he wrote about me. But if you do not believe what he wrote, how will you believe what I say?”
This is a very important piece of scripture to know and understand when talking to people who doubt Jesus was who He said He was. Jesus says “Don’t take my word for it, take God’s.” God proclaimed who Jesus was through John the Baptist, through the Spirit in our hearts, and through the Old Testament scriptures. The last one especially is a good one to become familiar with, because prophecies about the Messiah go back long before Jesus was born, as far as Moses.
CS Lewis wrote that you have to believe Jesus was either crazy, lying, or right about His identity. He existed, there is no question there. He is one of the most well-documented figures of ancient times. So was He crazy? There certainly is no way to prove He wasn’t. But if He was crazy, than John the Baptist must have been too, and Paul, and Peter, and the gospel writers, and John, and everyone else who ever wrote or testified of having an experience with Him. And the longer that list gets the harder it is to believe. Was He lying? Again, we can’t prove He wasn’t. But when you go back and read the prophecies like Isaiah, it’s hard to believe. Especially when you consider the fact that Jesus’s interpretation of those prophecies was radically different from anything else that had ever been said. Ever. Besides, as CS Lewis points out, it is unlikely that He would have been willing to make a martyr Himself for a lie. What’s the point in that? So… was He telling to truth? I believe so. Facts aside, I take Jesus’s advice and listen to what God is telling me through the Spirit. And the Spirit in my heart screams a resounding YES.