Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.
Cleanse ourselves. This concludes the exhortation (2 Corinthians 6:1; 2 Corinthians 6:14; 2 Timothy 2:21; 1 John 3:3; Revelation 22:11), and ought to be attached to 2 Corinthians 6:1-18.
Filthiness - "the unclean thing" (2 Corinthians 6:17).
Of the flesh - for instance, fornication, prevalent at Corinth (1 Corinthians 6:15-18).
And spirit - as idolatry, direct or indirect (1 Corinthians 6:9; 1 Corinthians 8:1; 1 Corinthians 8:7; 1 Corinthians 10:7; 1 Corinthians 10:21-22). The spirit (Psalms 32:2) receives pollution through the flesh, the instrument of uncleanness. "Flesh and spirit:" the whole man, outward and inward.
Perfecting holiness. Cleansing away impurity is a positive step toward holiness (2 Corinthians 6:17). It is not enough to begin: the end crowns the work (Galatians 3:3; Galatians 5:7; Philippians 1:6).
Fear of God - often conjoined with the most glorious promises (2 Corinthians 5:11; Hebrews 4:1). Privilege and promise go hand in hand.