Shared ground

Jude turns from describing the disruptive people to strengthening the “beloved” community. The core move is contrast: the readers are to remember what the apostles already said (vv.17–18), recognize that the present agitators fit that pattern (v.19), and then respond with practices that preserve community life (vv.20–21) and with careful, differentiated help for those being affected (vv.22–23).

The passage treats apostolic teaching as a stable reference point for identifying counterfeit leadership and corrosive behavior. It also assumes the “last time” involves heightened moral confusion and testing rather than offering a dated schedule.

Where interpretation differs (only where needed)

Some differences arise around Jude’s descriptions and how to map them onto people in the community:

1. “Not having the Spirit” (v.19). Some read this mainly as a moral diagnosis: their behavior shows they are operating by mere impulse and therefore not under the Spirit’s influence. Others read it as a spiritual-status claim: Jude is saying these people do not belong to God at all.

2. How many groups in vv.22–23. Some read two groups: (a) those who doubt/hesitate and need compassion, and (b) those in immediate danger who need urgent rescue with caution. Others see three groups by taking “with fear” as introducing a third category: compassion for some, urgent rescue for others, and fearful mercy for a third set who are more entangled.

3. “Making a distinction” (v.22). Some take it as discernment—carefully assessing cases. Others take it as referring to the person’s inner conflict (doubt/hesitation), so compassion is directed to those wavering.

Why the disagreement exists

The pressure points come from brief phrases that can be read more than one way without extra context: “last time,” “not having the Spirit,” and the compact wording and punctuation possibilities in vv.22–23. The vivid image “clothing stained by the flesh” (v.23) also leaves room for whether Jude is using a general moral picture or echoing concrete purity imagery.

What this passage clearly contributes

Explicit in the text: Jude tells the beloved to remember apostolic words; the apostles predicted mockers in “the last time”; these mockers follow ungodly desires; the current divisive people match that pattern; they are described as divisive, driven by mere impulse, and “not having the Spirit”; and the community is to build itself up on its “most holy faith” (vv.17–20).

Reasonable inference from the flow: Jude links perseverance to shared belief, Spirit-enabled prayer, remaining within the shape of God’s love, and a future-oriented expectation of Jesus’ mercy leading to eternal life (vv.20–21). He also frames restoration work as differentiated: compassion in some cases, urgent intervention in others, and moral caution so that help does not become participation in the same corruption (vv.22–23).