Ephesians 5:8-13

Verse 8

For ye were sometimes (ποτε, formerly) darkness - While ye lived in darkness, ye lived in these crimes.

But now are ye light in the Lord - When ye were in heathenish darkness ye served divers lusts and pleasures, but now ye have the light - the wisdom and teaching which come from God; therefore walk as children of the light - let the world see that ye are not slaves to the flesh, but free, willing, rational servants of the Most High; not brutish followers of devil gods.
Verse 9

For the fruit of the Spirit - Instead of Spirit, Πνευματος, ABD*EFG, the Syriac, Coptic, Sahidic, Ethiopic, Armenian, Vulgate, and Itala, together with several of the fathers, read φωτος, light, which is supposed by most critics to be the true reading, because there is no mention made of the Spirit in any part of the context. As light, Eph 5:8, not only means the Divine influence upon the soul, but also the Gospel, with great propriety it may be said: The fruit of the light, i.e. of the Gospel, is in all goodness, and righteousness, and truth. Goodness, αγαθωσυνῃ, in the principle and disposition; righteousness, δικαιοσυνη, the exercise of that goodness in the whole conduct of life; truth, αληθεια, the director of that principle, and its exercise, to the glorification of God and the good of mankind.
Verse 10

Proving what is acceptable - By walking in the light - under the influence of the Divine Spirit, according to the dictates of the Gospel, ye shall be able to try, and bring to full proof, that by which God is best pleased. Ye shall be able to please him well in all things.
Verse 11

Have no fellowship - Have no religious connection whatever with heathens or their worship.

Unfruitful works of darkness - Probably alluding to the mysteries among the heathens, and the different lustrations and rites through which the initiated went in the caves and dark recesses where these mysteries were celebrated; all which he denominates works of darkness, because they were destitute of true wisdom; and unfruitful works, because they were of no use to mankind; the initiated being obliged, on pain of death, to keep secret what they had seen, heard, and done: hence they were called απορῥητα μυστηρια, unspeakable mysteries - things that were not to be divulged. That the apostle may refer to magic and incantations is also probable, for to these the Ephesians were greatly addicted. See the proofs in the notes on Act 19:19.

Rather reprove them - Bear a testimony against them; convince them that they are wrong; confute them in their vain reasons; reprove them for their vices, which are flagrant, while pretending to superior illumination. All these meanings has the Greek word ελεγχω, which we generally render to convince or reprove.
Verse 12

For it is a shame even to speak - This no doubt refers to the Eleusinian and Bacchanalian mysteries, which were performed in the night and darkness, and were known to be so impure and abominable, especially the latter, that the Roman senate banished them both from Rome and Italy. How the discovery of these depths of Satan was made, and the whole proceedings in that case, may be seen in Livy, Hist. lib. xxxix. cap. 8-19, where the reader will see the force of what the apostle says here: It is a shame even to speak of those things which are done of them in secret; the abominations being of the most stupendous kind, and of the deepest dye.
Verse 13

But all things that are reproved - Dr. Macknight paraphrases this verse as follows: "Now all these reprovable actions, ελεγχομενα, which are practised in celebrating these mysteries, are made manifest as sinful by the Gospel; and, seeing every thing which discovers the true nature of actions is light, the Gospel, which discovers the evil nature of the actions performed in these mysteries, is light."

The apostle speaks against these mysteries as he speaks against fornication, uncleanness, and covetousness; but by no means either borrows expression or similitude from them to illustrate Divine truths; for, as it would be a shame even to speak of those things, surely it would be an abomination to allude to them in the illustration of the doctrines of the Gospel.
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