John Calvin on Ephesians 5:6-7

6. Let no man deceive you. There have always been ungodly dogs, “Mastins.” “Mastiffs.” by whom the threatenings of the prophets were made the subject of merriment and ridicule. We find such characters in our own day. In all ages, indeed, Satan raises up sorcerers of this description, who endeavor by unholy scoffs to escape the Divine judgment, and who actually exercise a kind of fascination over consciences not sufficiently established in the fear of God. “This is a trivial fault. Fornication is viewed by God as a light matter. Under the law of grace God is not so cruel. He has not formed us so as to be our own executioners. The frailty of nature excuses us.” These and similar expressions are often used by the scoffers. Paul, on the contrary, exclaims that we must guard against that sophistry by which consciences are ensnared to their ruin.

For because of these things cometh the wrath of God. If we consider the present tense to be here used, agreeably to the Hebrew idiom, for the future, these words are a threatening of the last judgment. But I agree with those who take the word cometh in an indefinite sense, — the word of God usually cometh, — as reminding them of the ordinary judgments of God which were executed before their own eyes. And certainly, if we were not blind and slothful, there are sufficiently numerous examples by which God testifies that he is the just avenger of such crimes, — examples of the pouring out of divine indignation, privately against individuals, and publicly against cities, and kings, and nations.

Upon the children of disobedience, — upon unbelievers or rebels. This expression must not be overlooked. Paul is now addressing believers, and his object is not so much to present alarming views of their own danger, as to rouse them to behold reflected in wicked men, as in mirrors, the dreadful judgments of God. God does not make himself an object of terror to his children, that they may avoid him, but does all that can be done in a fatherly manner, to draw them to himself. They ought to learn this lesson, not to involve themselves in a dangerous fellowship with the ungodly, whose ruin is thus foreseen.

Ephesians 5:8-14

8. For ye were sometimes darkness, but now are ye light in the Lord: walk as children of light;

8. Eratis aliquando tenabrae; nunc autem lux in Domino; tanquam filii lucis ambulate;

9. (For the fruit of the Spirit is in all goodness, and righteousness, and truth;)

9. (Fructus enim lucis in omni bonitate, et justitia, et veritate:)

10. Proving what is acceptable unto the Lord.

10. Probantes, quid sit acceptum Deo.

11. And have no fellowship with the unfruitful works of darkness, but rather reprove them

11. Et ne communicetis operibus infructuosis tenebrarum; quin potius etiam redarguitote.

12. For it is a shame even to speak of those things which are done of them in secret.

12. Quae enim clam fiunt ab illis, turpe est vel dicere.

13. But all things that are reproved are made manifest by the light: for whatsoever doth make manifest is light.

13. Omnia autem, dum coarguuntur, a luce manifestantur; omne enim quod manifestat lux est.

14. Wherefore he saith, Awake thou that sleepest, and arise from the dead, and Christ shall give thee light.

14. Quamobrem dicit: Surge qui dormis, et exsurge ex mortuis; et illucescet tibi Christus.