"If we receive the witness of men, the witness of God is greater: for this is the witness of God which he hath testified of his Son." (1 John 5:9, #KJV)

Most of us have friends that we can take their word for anything. We trust them. In the same way, God expects us to trust Him when He tells us of His Son Jesus. He calls Himself the "friend that sticketh closer than a brother" in Proverbs, and He will never lie to us. His witness is truly greater than even our best friend's witness.