For God so loved the world that he gave his only Son, that whoever believes in him should not perish but have eternal life.
What He saith, is of this kind: Marvel not that I am to be lifted up that ye may be saved, for this seemeth good to the Father, and He hath so loved you as to give His Son for slaves, and ungrateful slaves. Yet a man would not do this even for a friend, nor readily even for a righteous man; as Paul has declared when he said, “Scarcely for a righteous man will one die.” (Rom. v. 7.) Now he spoke at greater length, as speaking to believers, but here Christ speaks concisely, because His discourse was directed to Nicodemus, but still in a more significant manner, for each word had much significance. For by the expression, “so loved,” and that other, “God the world,” He shows the great strength of His love. Large and infinite was the interval between the two. He, the immortal, who is without beginning, the Infinite Majesty, they but dust and ashes, full of ten thousand sins, who, ungrateful, have at all times offended Him; and these He “loved.” Again, the words which He added after these are alike significant, when He saith, that “He gave His Only-begotten Son,” not a servant, not an Angel, not an Archangel. And yet no one would show such anxiety for his own child, as God did for His ungrateful servants. – St. John Chrysostom, Homily XXVII on the Gospel of John