Hark the herald angels sing
“Glory to the newborn King!
Peace on earth and mercy mild
God and sinners reconciled”
Veiled in flesh the Godhead see
Hail the incarnate Deity
Pleased as man with man to dwell
Jesus, our Emmanuel
“Hark the Herald Angels Sing” is as much an Easter carol as it is a Christmas carol. Indeed, there would be no Christmas without Easter. Jesus’ humble birth, however miraculous, would have been a forgotten historical anomaly had he not been raised in victory. Wesley’s famous hymn calls to mind Gregory of Nyssa’s infamous fishhook analogy:
[A]s has been said before, it was not in the nature of the opposing power to come in contact with the undiluted presence of God, and to undergo His unclouded manifestation, therefore, in order to secure that the ransom in our behalf might be easily accepted by him who required it, the Deity was hidden under the veil of our nature, that so, as with ravenous fish, the hook of the Deity might be gulped down along with the bait of flesh, and thus, life being introduced into the house of death, and light shining in darkness, that which is diametrically opposed to light and life might vanish; for it is not in the nature of darkness to remain when light is present, or of death to exist when life is active. (Gregory of Nyssa, Dogmatic Treatises, Etc. XXIV)
This colorful imagery is echoed by Martin Luther:
[H]e suffered, died, and descended into hell that he might overcome them all. Now since it was such a one who did all this, and death and hell could not swallow him up, these were necessarily swallowed up by him in a mighty duel; for his righteousness is greater than the sins of all men, his life stronger than death, his salvation more invincible than hell. (Martin Luther, On Christian Liberty)
In an ultimate act of poetic justice, God deceivers the Deceiver, devours the Devourer; the roaring Lion gets eaten by the bleating Lamb. The Resurrection therefore fulfills Isaiah’s prophecy that the Lord will “swallow up death forever” (Is 25:8), which serves as the basis of our own hope of resurrection—that “death has been swallowed up in victory” (1 Cor 15:4) and that “what is mortal may be swallowed up by life” (2 Cor 5:4).
Evangelicals tend not to observe continuity between Christian holidays. The very concept of a liturgical year is foreign to most nondenominational churches, probably due to excessive paranoia of revering lifeless religious traditions (only to replace them with lifeless traditions of their own). It may also be due to the fact that for a liturgical year to be meaningfully implemented, a decent amount of thought and reflection is required (which, coincidentally, have also been replaced by various forms of passive entertainment).