Jude 1:21 - Coke's Commentary on the Holy Bible

Keep yourselves in the love of God,— The word 'Εαυτους is put for αλληλου, one another, both here and in Jude 1:20. See 1 Thessalonians 5:11; 1 Thessalonians 5:13. The meaningand connection is, that bybuilding up one another upon their most holy faith, and praying by the aid or inspiration of the Spirit, they should preserve one another in a sincere love to God and goodness, and in that way they might expect the mercy of our Lord Jesus Christ unto eternal life.