Jude
Jude 1:21BSB·traditional attribution

keep yourselves in the love of God as you await the mercy of our Lord Jesus Christ to bring you eternal life.

John Calvin Reformed @genevareformer

21. Keep yourselves in the love of God. He has made love as it were the guardian and the ruler of our life; not that he might set it in opposition to the grace of God, but that it is the right course of our calling, when we make progress in love.

Matthew Henry Presbyterian @wholebiblehenry

Here, I. The apostle enlarges further on the character of these evil men and seducers: they are murmurers, complainers, etc., Jde 1:16. Observe, A murmuring complaining temper, indulged and expressed, lays men under a very bad character; such are very weak at least, and for the most part very wicked.

Commenting on Jude 1:16-25

John Gill Reformed Baptist @doctorgill

Keep yourselves in the love of God,.... By which may be meant either the grace and favour of God, that love with which God loves his people; and then the exhortation to the saints to keep themselves in it is, to set it always before them, to keep it constantly in view, to exercise faith on it, firmly believing their interest in it; as also...