Shared ground

These verses shift from what John sees to what the scene means. An elder takes the role of an interpreter by asking John who the white-robed people are and where they came from. John’s reply (“you know”) confirms that John is a witness who needs explanation, and that the elder is presented as a reliable guide inside the vision.

The elder’s explanation makes two explicit claims about the crowd. First, they “come out of the great oppression.” Second, their white robes are explained by a striking image: they “washed their robes” and “made them white in the Lamb’s blood.” The passage connects present purity/brightness with the Lamb’s saving work and with their passage through hardship.

Where interpretation differs (only where needed)

What “the great oppression” refers to. Some read it as a specific, climactic period of intense suffering still to come. Others read it more broadly as the severe pressure and suffering believers experience across time (including the first-century setting), with no requirement that it be limited to one final event.

How to understand “washed…in the Lamb’s blood.” Many agree it is symbolic language (since blood normally stains rather than whitens), but they differ on what the symbol emphasizes. Some stress cleansing from sin through the Lamb’s death. Others stress loyalty to the Lamb shown through suffering, with the “washing” image highlighting faithful endurance grounded in what the Lamb has done.

Who the elder is and how much he represents. The text calls him “one of the elders” without further identification. Some treat him mainly as a narrative guide. Others think the elders more strongly represent heavenly leadership (or the people of God in an idealized form), which can color how they read the authority of his interpretation.

Why the disagreement exists

The passage uses compressed, visionary language. “Coming out” can sound like a single exit from a single crisis, but it can also describe a repeated reality (people continually emerging from hardship). Also, “washing in blood” is deliberately paradoxical, pushing readers toward meaning rather than a literal picture. Finally, Revelation often layers meanings so that one image can speak to both John’s near-term world and a larger, ultimate horizon.

What this passage clearly contributes

1. It shows that the white robes are not merely decorative; they signify an identity and history that require interpretation.

2. It explicitly links the crowd’s whiteness to the Lamb (“in the Lamb’s blood”), grounding their purity/rightness-before-God in what the Lamb has done rather than in social status or outward success.

3. It explicitly frames hardship (“the great oppression”) as part of the story of this purified people—without, in these verses, spelling out the exact timeframe or mechanics.

4. It models Revelation’s method: heavenly explanation interprets earthly-looking suffering from God’s perspective, with the elder’s words functioning as the authorized reading of what John sees (compare the larger vision context in Revelation 7:9).