"‘But I have testimony greater than John’s.’”
Jesus mentions a number of “witnesses” that He has: John the Baptist; the works that the Father gave Him; “the Father who sent me”; and the Scriptures. And what do these witness to about Jesus: that He ran a red light? that’s He’s a nice guy? that He’s the son of Mary? Jesus elaborates for us, in speaking about the witness of His works: “these works that I perform testify on my behalf that the Father has sent me.”
If you were to ask the average Christian, “Why did Jesus die on the Cross?”, you might hear, “To wash away our sins.” This is true. But Jesus’ Passion, Death and Resurrection accomplish more than this only. The Cross and Resurrection are the foundation of one’s Christian life.
The phrase “one’s Christian life” sounds a little abstract, but at the foundation of the Christian life is the truth that through Jesus Christ, we are sons and daughters of God the Father. There is nothing abstract about this relationship. The glory of the Resurrection is a glory that is promised to us as God’s sons and daughters. But what is most moving about this truth is that we already share in this glory, if but dimly, to the extent that we live our Christian life now as witnesses to Jesus Christ, the Father’s only-begotten Son.