VII.
(1) Having therefore these promises... let us cleanse ourselves from all filthiness. — The thought is identical with that of 1 John 3:3. In each there is the contrast between the high ideal to which the believer in Christ is called and the infinite debasement into which he may possibly sink. St. John characteristically presents the law of the spiritual life as a generalised fact of experience: “Every man who has the hope actually does purify himself.” The word for “filthiness” does not occur elsewhere in the New Testament. In 2Ma. 1:27, it is used of the “pollution” of idolatry; in the LXX. of Jeremiah 23:14 (where the English version gives “a horrible thing,” and the margin “filthiness”) of the sin of Sodom and Gomorrah. The cognate verb is used of sexual impurity in Revelation 14:4, and probably with the same sense in Revelation 3:4, and this is manifestly what St. Paul has in his thoughts here. The two thoughts — idolatry and impurity — were inextricably blended in his mind. He had been warning men against the feasts that were held in the idol’s temple. He cannot close his eyes to the “hidden things of shame” that were their constant and inevitable accompaniments. But that contagion of impurity might spread to the inward parts. Mind and conscience might be defiled (Titus 1:15). The literature of the Empire, as seen in Catullus and Martial and Juvenal, shows only too terribly what St. Paul meant by “filthiness of the spirit.” The very element in man by which he is raised above the brute creatures that lead a simply animal or natural life — his imagination, fancy, discernment of analogies — sinks him to an infinite depth below them.
Perfecting holiness in the fear of God. — The word for “holiness” involves the idea of consecration, and grows out of the thought that the “saints” of God make up collectively, as in 2 Corinthians 6:16, the Temple in which He dwells. As the former clause of the verse presents the negative aspect of purity, abstinence from all that desecrates, this presents the positive, the perfect consecration, and this is wrought out in its completeness, in “the fear of God” — the reverential awe before the thought of God’s presence. The word is the same as that mis-translated “terror” in 2 Corinthians 5:11.