John 6:46

Not that any man hath seen the Father save He which is of God, He hath seen the Father.

At this point the Jews started to grumble, to murmur among themselves, to express their disapproval. The idea that this man should Himself be that wonderful Bread which had come down from heaven seemed preposterous to them. They could not merely not understand how this could be true, but they believed themselves to be in possession of evidence to the contrary. They were sure that they knew His antecedents, they were acquainted with His mother, they knew the name of His father. Note: It has always been an offense to the reason of man that God and man are united in the person of Jesus. But the Lord here advises against all murmuring, against all attempts to make the matter plausible to reason. For no man can come to Christ by His own reason and strength. All brooding and disputing will not work faith in the heart. There must be a drawing on the part of the Father, by whose strength faith is worked in the heart. Without this work on the part of the Father there can be no faith nor any rising to eternal life. That is the origin, the reason of belief in Jesus: the Father draws to the Son; He influences heart and will in such a way that a person accepts Jesus as His Savior and disregards entirely all difficulties which his reason may experience in the understanding of the person of the Savior. God not only gives the power to come to faith and to choose the good, but He works, creates all good in man and makes him willing. Faith is altogether a work of God. "What does 'no man' mean? Do you think it refers only to a cow or ass, or some other animal? Rather 'no man' here refers to the entire human race, the whole world, no man excepted, the most powerful, the most holy, the most prudent, the wisest. It is spoken briefly, but it is a powerful phrase, which thrusts down and throws to the ground all that is called human wisdom, reason, judgment, righteousness, and holiness, also religion and worship. For to come to this article and salvation in Christ no wisdom helps, no prudence, no shedding of blood and giving of alms, nor what the entire human generation is able to do with wisdom, with piety and sanctity. For it says: No man can come to Me, except the Father draw him. This should be taught" This fact Jesus substantiates by a passage from the prophets: They will all be taught by God, Isaiah 54:13. Those that are taught of God, that have learned the lesson of their own inability and lack of strength, and therefore both hear the Father and in all things learn of Him, only they can come to faith in Christ. The Father uses no compulsion, but makes use of teaching only. He appeals to the reason and understanding, to the heart and the will of men, teaches and persuades and makes them willing. And this is possible only because God incidentally illumines the heart. In that way the Father works the willingness, in that way man becomes eager to come to Jesus by faith in His atonement. This is not to be understood as though there were any physical contact between God and man; the knowledge of God was not communicated directly, by immediate vision of God. There is only one Man who has received His Being directly from God and who is also in immediate communication with God; He it is that has seen the Father. For that reason it is essential that a Christian believe the Word of Jesus without the slightest doubt, since His deity demands as much.