“The energy behind your spiritual progress is not your human abilities or resources, although God might bless you with an abundance of both. Nor is it the encouragement and support of other Christians, although the ministry of fellow believers is certainly a great blessing. It isn’t human pastors and teachers who instruct you in God’s Word and care for you as shepherd cares for his sheep. It isn’t even the holy angels who are sent froth from heaven as ministering spirits (Heb. 1:14).
The real cause of all spiritual progress is this alone: God Himself working within you to effect your sanctification. That’s why sanctification can never be totally deterred. The same God who justifiers you sanctifies you and will ultimately glorify you (Rom. 8:30). Salvation will always produce the fruit of righteousness (James 2:17-26; Eph. 2:10). It’s inevitable; the unchanging, glorious, sovereign, majestic, righteous, holy, gracious, and merciful god, the God who rules all things and always does what He desires–that God is at work in you, and He is never thwarted” p205 Our Sufficiency in Christ by John MacArthur