Where does the ability to separate ourselves from the ungodly world come from?
The ability to separate ourselves from the ungodly world comes from God's saving grace. Scripture says if we have the wherewithal as a result of that grace, we can separate from the ungodly world, and then God will be a Father to us, calling us sons and daughters.
Les explains that this ability is a result of God's saving grace. He points to 2 Corinthians 7:1, where Paul, having just spoken of the promise that God will be a Father and call us sons and daughters, urges believers to cleanse themselves from all filthiness of the flesh and spirit, perfecting or growing in maturity in holiness in the fear of God. Les notes this relationship is ours as members of the Body of Christ, and the wherewithal to separate from the ungodly world around us comes from that grace.
And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.