Purgatory or Promise? Reclaiming the Hope of Revelation 21:27

The following article was submitted by guest author, Jason Evans.

"And he carried me away in the Spirit to a mountain great and high, and showed me the Holy City, Jerusalem, coming down out of heaven from God. It shone with the glory of God, and its brilliance was like that of a very precious jewel, like a jasper, clear as crystal."

(Revelation 21:10-11).

A city of pure gold. Foundations adorned with every kind of precious stone. Gates that will never be shut, each made of single pearls. Streets of gold, as pure as transparent glass. The glory of the Lord God Almighty and the Lamb (Christ) as its temple and its enduring light. The glory and honor of the nations brought into it to dwell with God. Freedom to drink from the water of life. No more death, mourning, crying, or even pain. Eternity in the holy presence of our God. For twenty-six verses in Revelation 21, John tells us of the splendor and majesty of the Holy City—the New Jerusalem—that awaits all believers at the renewal of all things. Yet, right alongside this breathtaking description, John introduces a strict boundary in verse 27: "Nothing impure will ever enter it, nor will anyone who does what is shameful or deceitful, but only those whose names are written in the Lamb’s book of life." Depending on your theological framework, this boundary reads either as a terrifying warning or as the ultimate anchor of Christian hope.

In Catholic apologetics, this verse is treated as a foundational proof text. "Nothing impure will ever enter it!" they argue, asserting that a post-mortem cleansing is required for the partially purified. But this introduces a massive theological non sequitur. John is describing who has access to the city, not a cosmic cleaning station. To say "Nothing impure enters, therefore purgatory exists" completely ignores how we are purified in the first place.

To understand how we are truly purified, we must turn to 1 John 1:7 and 9: "But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus, his Son, purifies us from all sin (...) He is faithful and just and will forgive us our sins and purify us from all unrighteousness." All sin. All unrighteousness. Further, as Hebrews 10:14 tells us, "For by one sacrifice He has made perfect forever those who are being made holy." By the blood of Christ, there are no leftover stains for a cosmic purification station to scrub away. His sacrifice is entirely sufficient and forever perfect, rendering the concept of a post-mortem purgatory obsolete.

However, establishing that we enter heaven completely clean often gives rise to a deeper, more lingering anxiety about our security once we arrive. If our own merit didn't get us through the gates, how can we be sure we won't mess things up and be cast out just like Satan and his legion of angels? This fear frequently manifests in a question you may have heard asked, or even asked yourself: "What happens if we sin in heaven?" After all, if we look back at our earlier reading, John’s boundaries seem incredibly stark: "Those who are victorious will inherit all this, and I will be their God and they will be my children. But the cowardly, the unbelieving, the vile, the murderers, the sexually immoral, those who practice magic arts, the idolaters and all liars— they will be consigned to the fiery lake of burning sulfur. This is the second death" (Revelation 21:7 - 8). Plus, "Nothing impure will ever enter it, nor will anyone who does what is shameful or deceitful, but only those whose names are written in the Lamb’s book of life" (Revelation 21: 27)! At first glance, it may very well appear that those streets of pure gold might be lined with eggshells and laid over incredibly thin ice. One misstep, and we're trading eternity with God for endless torment. The truth, however, is in the hope contained within these verses— especially verse 27.

Let us first examine verses 7-8 more closely. Notice the binary: those who are victorious will inherit the Kingdom, but those who have chosen to persist in their sin will be cast into the lake of fire. There is no third option. But how do we know if we have the victory or not? Again, we can turn to 1 John, "for everyone born of God overcomes the world. This is the victory that has overcome the world, even our faith" (1 John 5:4). Paul goes a step further, calling us "...captives in Christ's triumphal procession..." (2 Corinthians 2:14) and reminding us that we are "...more than conquerors..." (Romans 8:37). Since we share in His victory, we also share in His inheritance (Ephesians 1:13-14). With this in mind, let us now look to the promise of hope found in Revelation 21:27.

Nothing impure will ever enter into the New Jerusalem. While the text literally bars outside defilement from passing through the gates, it carries an even deeper promise for those already inside: the environment of heaven renders sin impossible. The answer to "What happens if we sin in heaven?" is that the temptation, the capacity, and the very presence of sin are permanently locked outside those gates. Just as there will be no more sun or moon—for the glory of God and of Christ will illuminate the city—so also will sin and its purveyors (the devil and his angels) be banished from His presence, cast into the lake of fire (Matthew 25:41; Revelation 20:10) and eternally denied access to the Holy City.

Therefore, rejoice that your name is written in heaven (Luke 10:20; Hebrews 12:23)! Rejoice that He has granted you access to His Holy City, where you and I have the right to the tree of life and the free gift of the water of life (Revelation 22:14, 17)! Through Christ Jesus and in Him we have the victory. We do not enter the city as trespassing citizens walking on probation; we enter as the Bride of Christ, perfectly clothed in His righteousness. On that day, we will dwell with Him forever—needing no further purification, and completely secure from all that would try to separate us from His enduring love. And that, my friends, is the true hope John gives us in Revelation 21:27. It is not written to threaten us with an additional, unnecessary sin-removal process in some mystical realm, but to assure us of the everlasting promise that the complete purification we have already undergone in Christ will be permanent. Hallelujah!