The person who has accepted it has certified that God is truthful.
NIV
Whoever receives His testimony has set his seal of approval to this: God is true. [That man has definitely certified, acknowledged, declared once and for all, and is himself assured that it is divine truth that God cannot lie].
AMP
He that hath received his testimony hath set to his seal that God is true.
KJV
He testifies to what he has seen and heard, but no one accepts his testimony.
NIV
It is to what He has [actually] seen and heard that He bears testimony, and yet no one accepts His testimony [no one receives His evidence as true].
AMP
And what he hath seen and heard, that he testifieth; and no man receiveth his testimony.
KJV
The bride belongs to the bridegroom. The friend who attends the bridegroom waits and listens for him, and is full of joy when he hears the bridegroom's voice. That joy is mine, and it is now complete.
NIV
He who has the bride is the bridegroom; but the groomsman who stands by and listens to him rejoices greatly and heartily on account of the bridegroom's voice. This then is my pleasure and joy, and it is now complete. [S. of Sol. 5:1.]AMP
He that hath the bride is the bridegroom: but the friend of the bridegroom, which standeth and heareth him, rejoiceth greatly because of the bridegroom's voice: this my joy therefore is fulfilled.
KJV
The one who comes from above is above all; the one who is from the earth belongs to the earth, and speaks as one from the earth. The one who comes from heaven is above all.
NIV
He Who comes from above (heaven) is [far] above all [others]; he who comes from the earth belongs to the earth, and talks the language of earth [his words are from an earthly standpoint]. He Who comes from heaven is [far] above all others [far superior to all others in prominence and in excellence].
AMP
He that cometh from above is above all: he that is of the earth is earthly, and speaketh of the earth: he that cometh from heaven is above all.
KJV
To this John replied, "A person can receive only what is given from heaven."
NIV
John answered, A man can receive nothing [he can claim nothing, he can take unto himself nothing] except as it has been granted to him from heaven. [A man must be content to receive the gift which is given him from heaven; there is no other source.]AMP
John answered and said, A man can receive nothing, except it be given him from heaven.
KJV