1:24 {10} Wherefore {i} God also {k} gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves:
(10) The unrighteousness of men he sets forth first in this, that following their lusts, even against nature, they defiled themselves one with another, by the just judgment of God.
(i) The contempt of religion is the source of all evil.
(k) As a just judge.
1:24 Wherefore. Having chosen folly, God gave them up to the consequences of their folly, and there followed an awful moral degradation which is now described. Their false religion was no check upon their lusts. They engaged in the lowest and most disgusting lusts. Language cannot describe the pollution of the Gentile world, when Paul wrote, as revealed by the pagan writers of that period.
1:24 Wherefore - One punishment of sin is from the very nature of it, as Rom 1:27; another, as here, is from vindictive justice. Uncleanness - Ungodliness and uncleanness are frequently joined, 1Thes 4:5 as are the knowledge of God and purity. God gave them up - By withdrawing his restraining grace.
1:18-25 The apostle begins to show that all mankind need the salvation of the gospel, because none could obtain the favour of God, or escape his wrath by their own works. For no man can plead that he has fulfilled all his obligations to God and to his neighbour; nor can any truly say that he has fully acted up to the light afforded him. The sinfulness of man is described as ungodliness against the laws of the first table, and unrighteousness against those of the second. The cause of that sinfulness is holding the truth in unrighteousness. All, more or less, do what they know to be wrong, and omit what they know to be right, so that the plea of ignorance cannot be allowed from any. Our Creator's invisible power and Godhead are so clearly shown in the works he has made, that even idolaters and wicked Gentiles are left without excuse. They foolishly followed idolatry; and rational creatures changed the worship of the glorious Creator, for that of brutes, reptiles, and senseless images. They wandered from God, till all traces of true religion must have been lost, had not the revelation of the gospel prevented it. For whatever may be pretended, as to the sufficiency of man's reason to discover Divine truth and moral obligation, or to govern the practice aright, facts cannot be denied. And these plainly show that men have dishonoured God by the most absurd idolatries and superstitions; and have degraded themselves by the vilest affections and most abominable deeds.