And shall receive the reward of unrighteousness, as they that count it pleasure to riot in the day time. Spots they are and blemishes, sporting themselves with their own deceivings {n} while they feast with you;

(n) When by being among the Christians in the holy banquets which the Church keeps, they would seem by that to be true members of the Church, yet they are indeed but blots on the Church.

People's New Testament

2:13 And shall receive the reward of unrighteousness. Their destruction is the legitimate reward of their own wrong doing.

As count it pleasure to riot in the day-time. Literally, in the day. I believe that the idea is that, like dumb brutes forgetful of coming destruction, they take pleasure in carousal for a day, regardless of the morrow.

Spots they are and blemishes. Marring the brightness and beauty of the church.

Sporting themselves with their own deceivings while they feast with you. Revelling in their love-feasts (Revised Version). Converting even these into scenes of revel.

Wesley's Notes

2:13 They count it pleasure to riot in the day time - They glory in doing it in the face of the sun. They are spots in themselves, blemishes to any church. Sporting themselves with their own deceivings - Making a jest of those whom they deceive and even jesting while they are deceiving their own souls.

Jamieson-Fausset-Brown Bible Commentary

13. receive-"shall carry off as their due."

reward of-that is, for their "unrighteousness" [Alford]. Perhaps it is implied, unrighteousness shall be its own reward or punishment. "Wages of unrighteousness" (2Pe 2:15) has a different sense, namely, the earthly gain to be gotten by "unrighteousness."

in the daytime-Translate as Greek, "counting the luxury which is in the daytime (not restricted to night, as ordinary revelling. Or as Vulgate and Calvin, "the luxury which is but for a day": so Heb 11:25, "the pleasures of sin for a season"; and Heb 12:16, Esau) to be pleasure," that is, to be their chief good and highest enjoyment.

Spots-in themselves.

blemishes-disgraces: bringing blame (so the Greek) on the Church and on Christianity itself.

sporting themselves-Greek, "luxuriating."

with-Greek, "in."

deceivings-or else passively, "deceits": luxuries gotten by deceit. Compare Mt 13:22, "Deceitfulness of riches"; Eph 4:22, "Deceitful lusts." While deceiving others, they are deceived themselves. Compare with English Version, Php 3:19, "Whose glory is in their shame." "Their own" stands in opposition to "you": "While partaking of the love-feast (compare Jude 12) with you," they are at the same time "luxuriating in their own deceivings," or "deceits" (to which latter clause answers Jude 12, end: Peter presents the positive side, "they luxuriate in their own deceivings"; Jude, the negative, "feeding themselves without fear"). But several of the oldest manuscripts, Vulgate, Syriac, and Sahidic Versions read (as Jude), "In their own love-feasts": "their own" will then imply that they pervert the love-feasts so as to make them subserve their own self-indulgent purposes.

Matthew Henry's Concise Commentary

2:10-16 Impure seducers and their abandoned followers, give themselves up to their own fleshly minds. Refusing to bring every thought to the obedience of Christ, they act against God's righteous precepts. They walk after the flesh, they go on in sinful courses, and increase to greater degrees of impurity and wickedness. They also despise those whom God has set in authority over them, and requires them to honour. Outward temporal good things are the wages sinners expect and promise themselves. And none have more cause to tremble, than those who are bold to gratify their sinful lusts, by presuming on the Divine grace and mercy. Many such there have been, and are, who speak lightly of the restraints of God's law, and deem themselves freed from obligations to obey it. Let Christians stand at a distance from such.