He that has received his testimony has set his seal to this that God is true.
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Clement Of Rome
Wherefore the Father bestows on him the glory and honour that was due and meet, putting on him the best robe, the robe of immortality; and a ring, a royal signet and divine seal,-impress of consecration, signature of glory, pledge of testimony (for it is said, "He hath set to his seal that God is true")
CHAPTER III. That Christ is God and of God by Nature.
In no other way was it possible to sho the impiety of them that believe not, except the glorious achievement of the believers were made known. For by the contrast of good things is the evil easily discerned, and the knowledge of what is better convicts the worse. If any then (saith he) have assented to the words of Him That cometh from above, he hath sealed and confirmed by his understanding, that truth is ever akin and most dear to the Divine Nature. Whence the converse is manifest to them that see. For he who thrusts away the faith will surely witness against himself, that God is not true. But we must again take notice, that he removes the Son from consubstantiality with the creation, and shews by what has been said that He is by Nature God. For if he that believeth the things spoken by Him, and receiveth the testimony which He gave of Himself, sealed and well confirmed that God is true; how shall not Christ be conceived of as ...
He that hath received his testimony. These following words to the end of the chapter, seem to be the words of St. John the Baptist, rather than of the evangelist. The sense is, whosoever hath believed, and received the doctrine of Christ, hath attested as it were under his hand and seal, that God is true, and hath executed his promise concerning the Messias. (Witham)
Here he touches his own disciples, as not being likely for a time to be firm believers. And that they did not even after this believe in Him, is clear from what is said afterwards; for John even when dwelling in prison sent them thence to Christ, that he might the more bind them to Him. Yet even then they scarcely believed, to which Christ alluded when He said, And blessed is he whosoever shall not be offended in Me. Matthew 11:6 And therefore now he said, And no man receives His testimony, to make sure his own disciples; all but saying, Do not, because for a time few shall believe in Him, therefore deem that His words are false; for, 'He speaks that He has seen.' Moreover he says this to touch also the insensibility of the Jews. A charge which the Evangelist at commencing brought against them, saying, He came unto His own, and His own received Him not. For this is no reproach against Him, but an accusation of those who received Him not. John 1:11
He that has received His testimony h...