1 Peter 1:3-9: "3 Blessed be the God and Father of our Lord Jesus Christ! According to his great mercy, he has caused us to be born again to a living hope through the resurrection of Jesus Christ from the dead, 4 to an inheritance that is imperishable, undefiled, and unfading, kept in heaven for you, 5 who by God's power are being guarded through faith for a salvation ready to be revealed in the last time. 6 In this you rejoice, though now for a little while, if necessary, you have been grieved by various trials, 7 so that the tested genuineness of your faith - more precious than gold that perishes though it is tested by fire - may be found to result in praise and glory and honor at the revelation of Jesus Christ. 8 Though you have not seen him, you love him. Though you do not now see him, you believe in him and rejoice with joy that is inexpressible and filled with glory, 9 obtaining the outcome of your faith, the salvation of your souls."
Luke 21:36: "'But stay awake at all times, praying that you may have strength to escape all these things that are going to take place, and to stand before the Son of Man.'"
John 12:46: "'I have come into the world as light, so that whoever believes in me may not remain in darkness.'"
Revelation 7:13-17: "13 Then one of the elders addressed me, saying, 'Who are these, clothed in white robes, and from where have they come?' 14 I said to him, 'Sir, you know.' And he said to me, 'These are the ones coming out of the great tribulation. They have washed their robes and made them white in the blood of the Lamb. 15 'Therefore they are before the throne of God, and serve him day and night in his temple; and he who sits on the throne will shelter them with his presence. 16 They shall hunger no more, neither thirst anymore; the sun shall not strike them, nor any scorching heat. 17 For the Lamb in the midst of the throne will be their shepherd, and he will guide them to springs of living water, and God will wipe away every tear from their eyes.'"
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The hymn's first verse seems to be drawn from Luke 21:36. The lines "Be sober and be watchful, / Our judge is at the gate" have the same idea, even if they're expressed in different words.
The second half of the second verse describes "Jesus' blessed light," which comes from John 12:46, although "The light that has no evening, / That knows no moon or sun" also incorporated Revelation 21:23: "And the city has no need of sun or moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb."
The third verse comes from 1 Peter 1. The hymn describes heaven as "the home of fadeless splendor" and "inviolate, unfading," attributes taken directly from 1 Peter 1:4. The hymn's description of "exiles mourn[ing]" seems to come from "you have been grieved by various trials" in 1 Peter 1:6.
The fourth and final verse seems to come from Revelation 7. "Relief for all distressed" seems to refer to the forgiveness of sins, which is depicted in Revelation 7:14. I think there's also a connection between the hymn's "true vision of true beauty" and revelation in a broader sense.
The second half of the second verse describes "Jesus' blessed light," which comes from John 12:46, although "The light that has no evening, / That knows no moon or sun" also incorporated Revelation 21:23: "And the city has no need of sun or moon to shine on it, for the glory of God gives it light, and its lamp is the Lamb."
The third verse comes from 1 Peter 1. The hymn describes heaven as "the home of fadeless splendor" and "inviolate, unfading," attributes taken directly from 1 Peter 1:4. The hymn's description of "exiles mourn[ing]" seems to come from "you have been grieved by various trials" in 1 Peter 1:6.
The fourth and final verse seems to come from Revelation 7. "Relief for all distressed" seems to refer to the forgiveness of sins, which is depicted in Revelation 7:14. I think there's also a connection between the hymn's "true vision of true beauty" and revelation in a broader sense.