Passage
These are they who set [themselves] apart, natural [men], not having [the] Spirit.
These are they who set [themselves] apart, natural [men], not having [the] Spirit.
Jude 1:17 But *ye*, beloved, remember the words spoken before by the apostles of our Lord Jesus Christ,
Jude 1:18 that they said to you, that at [the] end of the time there should be mockers, walking after their own lusts of ungodlinesses.
Jude 1:19 These are they who set [themselves] apart, natural [men], not having [the] Spirit.
Jude 1:20 But *ye*, beloved, building yourselves up on your most holy faith, praying in the Holy Spirit,
Jude 1:21 keep yourselves in the love of God, awaiting the mercy of our Lord Jesus Christ unto eternal life.
The verse centers on "Spirit", "themselves", "apart", "natural", and "having". It is saying that the verse draws attention to "Spirit" and "themselves", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 18's "that they said to you that at..." into verse 20's "But ye beloved building yourselves up on...", so "Spirit" and "themselves" belong inside that flow. In Jude context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "Spirit" and "themselves" with trust shaped by these words, not by a vague optimism outside the passage.