Jude 1:10

My Notes

What Does Jude 1:10 Mean?

Jude 1:10 describes false teachers with the same animal comparison Peter uses, but with a specific twist — their knowledge is the problem: "But these speak evil of those things which they know not: but what they know naturally, as brute beasts, in those things they corrupt themselves."

Two kinds of knowing. Two opposite results. First, they speak evil of what they don't know — blasphēmousin hosa ouk oidasin. They pronounce judgment on spiritual realities they've never understood. Angels, authority structures, divine mysteries — things beyond their experience and comprehension — and they speak against them with confidence. Their ignorance doesn't produce humility. It produces slander. Second, what they do know — hosa phusikōs hōs ta aloga zōa epistantai — they know naturally, instinctively, the way irrational animals know things. Physical appetites. Bodily impulses. The knowledge that requires no spiritual discernment. And in those things — the instinctual, animalistic, body-level knowledge — they corrupt themselves.

The contrast is devastating: in the spiritual realm, they're ignorant but loud. In the physical realm, they're knowledgeable but self-destructive. They can't perceive what's above them. They can only perceive what's below them. And the below-level knowledge — the instinct-knowledge, the appetite-knowledge — is the thing that destroys them. They're experts in the flesh and illiterate in the Spirit. And their expertise in flesh is killing them while their illiteracy in Spirit is misleading everyone who follows them.

Reflection Questions

• 1.Where are you fluent in the 'natural' (instinct, appetite, human dynamics) but illiterate in the spiritual — and does the gap concern you?
• 2.How do you identify someone who speaks confidently about spiritual things they don't actually understand?
• 3.Where has natural competence masked spiritual deficiency — in a leader you've followed or in yourself?
• 4.What does self-corruption through instinct-knowledge look like in practice — and where do you see it operating?

Devotional

They don't know the spiritual things. They do know the physical things. And both forms of knowing are destroying them — the spiritual ignorance through slander, the physical knowledge through corruption.

Jude's portrait of the false teacher is someone who's fluent in appetite and illiterate in the Spirit. They understand the body. They understand desire. They understand power, pleasure, and self-interest with the instinctive fluency of an animal following its nose to food. But spiritual reality — the invisible structures, the divine authorities, the mysteries that require spiritual perception — they can't see any of it. And instead of being humbled by their blindness, they mock what they can't perceive.

You've met this person. Maybe in a pulpit. Maybe on a podcast. Maybe in your own mirror. The person who's highly competent in the natural realm — charismatic, successful, instinctively skilled at navigating human dynamics — but spiritually illiterate. Who speaks confidently about God without actually knowing God. Who's fluent in the language of the flesh and can barely stammer in the language of the Spirit. And the natural competence masks the spiritual deficit so effectively that most people can't tell the difference.

The corruption is self-inflicted: "in those things they corrupt themselves." The body-knowledge isn't just insufficient. It's toxic. The instinct-expertise that makes them look competent is the same instinct-expertise that's rotting them from the inside. The appetite they follow with such natural skill is the appetite consuming them. And nobody watching from the outside can see the decay — until the collapse makes it visible to everyone.

Commentary

Trusted original commentary from respected historical Bible scholars and theologians.

Cross References

Related passages throughout Scripture