There was a man sent from God, whose name was John.
All Commentaries on John 1:6 Go To John 1
John Chrysostom
AD 407
After this esteem nothing that he says as human; for he speaks not his own, but his that sent him. And therefore the Prophet calls him a messenger, I send My messenger, for it is the excellence of a messenger, to say nothing of his own. But the expression, was sent, does not mean his entrance into life, but to his office. As Esaias wassent on his commission, not from any place out of the world, but from where he saw the Lord sitting upon His high and lofty throne; in like manner John was sent from the desert to baptize; for he says, He that sent me to baptize with water, the same said to me, Upon Whom you shall see the Spirit descending, and remaining on Him, the same is He which baptizes with the Holy Spirit.
Not because the light wanted the testimony, but for the reason which John himself self gives, viz. that all might believe on Him. For as He put on flesh to save all men from death; so He sent before Him a human preacher, that the sound of avoice like their own, might the readier draw men to Him.
Forasmuch however as with us, the one who witnesses, is commonly a more important, a more trustworthy person, than the one to whom he bears witness, to do away with any such notion in the present case the Evangelist proceeds; He was not that Light, but was sent to bear witness of that Light. If this were not his intention, in repeating the words, to bear witness of that Light, the addition would be superfluous, and rather a verbal repetition, than the explanation of a truth.