The Apostle Paul
Ephesians 5:17BSB·traditional attribution

Therefore do not be foolish, but understand what the Lord’s will is.

John Calvin Reformed @genevareformer

17. Wherefore be ye not unwise. He whose “delight is in the law of the Lord, and who meditates in it day and night,” (Psalm 1:2,) will triumph over every obstacle which Satan can oppose to his progress. Whence comes it that some wander, others fall, others strike against a rock, others go away, — but because we allow ourselves to be gradually blinded by...

Matthew Henry Presbyterian @wholebiblehenry

These verses contain a caution against all manner of uncleanness, with proper remedies and arguments proposed: some further cautions are added, and other duties recommended. Filthy lusts must be suppressed, in order to the supporting of holy love. Walk in love, and shun fornication and all uncleanness. Fornication is folly committed between unmarried persons. All uncleanness includes all other sorts of filthy lusts, which were too common among the Gentiles.

Commenting on Ephesians 5:3-20

John Gill Reformed Baptist @doctorgill

Speaking to yourselves in psalms, and hymns, and spiritual songs,.... By psalms are meant the Psalms of David, and others which compose the book that goes by that name, for other psalms there are none; and by "hymns" we are to understand, not such as are made by good men, without the inspiration of the Spirit of God; since they are placed between psalms and...