John Calvin Reformed @genevareformer

24 Now unto him that is able to keep you. He closes the Epistle with praise to God; by which he shews that our exhortations and labors can do nothing except through the power of God accompanying them. The doxology is as follows, — “To the only wise God (or, to the wise God alone) our Savior, be glory and greatness, might and dominion, both...

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

Now unto him that is able to keep you from falling,.... The people of God are liable to falling into temptation, into sin, into errors and mistakes, from an exercise of grace, or from a degree of steadfastness in Gospel truths, and even into a final and total apostasy, were it not for divine power; and they are not able to keep themselves.