Jude 1:10

An Understandable Version (2005 edition)

But these people [i.e., the “certain men” of verse 4] speak against whatever they do not understand, and what they do understand naturally, the way animals do, proves to be their ruination.

Cross References

Romans 2:14

(For when the [unconverted] Gentiles, who do not have the Law of Moses, instinctively practice [some of] its requirements, they become their own lawmakers, even though they do not have the Law of Moses.

Philippians 3:19

Their [ultimate] end is [spiritual] destruction; their god is their appetite; they boast of what they ought to be ashamed of, and they [constantly] think about worldly things.

2 Peter 2:12

However, these people are like unreasonable, ignorant creatures of instinct, born as animals which are [to be] caught and destroyed. They speak out against things about which they are ignorant. In [the process of] destroying others, they will certainly be destroyed themselves.