What is the context of Jude 1:20-21?

• Maintain Your Life with God (Jude 1:20-23 true)
• Exhortation and Benediction (Jude 1:20-25 true)
• Persevere in the Love of God (Jude 1:17-23 true)
• A Call to Remain Faithful (Jude 1:17-23 true)
• Advice to the Readers (Jude 1:17-23 true)
• A Call to Persevere (Jude 1:17-23 true)
• Keep Yourselves in the Love of God (Jude 1:17-25 true)