Dearly loved ones, as I was very eagerly planning to write to you about the salvation we share in common, I felt it necessary [instead] to write urging you to contend earnestly for the faith [i.e., the teaching of Christ] which was once and for all delivered [by the apostles, See verse 17] to the saints [i.e., God's holy people].

For certain men have come in privily, who long ago were before written to this very condemnation; ungodly men, perverting the favor of our God to lasciviousness, and denying the only sovereign Lord, even our Lord Jesus Christ.

Yet in the very same way these men, too, cherishing vain dreams, pollute our human nature, reject control, and malign the Mighty.

Now the very archangel Michael, when he disputed the body of Moses with Satan, did not dare to condemn him with scoffs; what he said was, The Lord rebuke you!

But these persons abuse everything they do not understand, and they are going to be destroyed by the very things they know by instinct, like the irrational animals.

To others show pity, but with caution, hating the very clothing polluted by their touch.