All the people and events of John’s narrative testify that Jesus is the Christ, the Son of God, and that He has all authority.
Those who receive Jesus must receive Him as He is and must receive from Him what He intends to give.
In his Gospel, John holds out the eternal Word to the world and then shows us both how the world should and how it does respond to Him.
Apart from grace, people do not want what they need, but God is gracious and enlivens the souls of His people to hunger and thirst for what He gives.