2 Corinthians 7:1

Having therefore these promises, beloved, let us cleanse ourselves from all defilement of flesh and spirit, perfecting holiness in the fear of God. [By an appeal to the prophets the apostle shows how it was God's design that his people should avoid all fellowship with unrighteous people in their unrighteous practices. To stimulate them to obedience, God had given them the wonderful promise that he would adopt them as his children if they would obey him in these things. This promise of adoption had been renewed in the new covenant, and belonged to all Christians, and therefore it behooved Christians not to temporize with evil because of any vainglorious desire to display their liberty, lest they should thereby lose the real and eternal glory of being adopted sons and daughters of God.]