This is absolutely fundamental to the main purpose of this Gospel — and the whole Bible. In John 1:14–16, John writes, “The Word [the eternal Son of God] became flesh [became human] and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth.” Then in verse 16, he relates the demonstration of that divine glory to us. Verse 16: “And from his fullness we have all received, grace upon grace.” So the pattern is this: Jesus reveals his divine glory — glory as of the only Son from the Father — and we behold it, and from its fullness we receive grace.

So the incarnate revealing of the glory of God in Christ, climaxing with the cross and the resurrection, and our seeing it is the way we receive grace — that is, the way we are saved and receive all the promises of eternal life.