from Jim Elliff's Comfort for Christian Parents. Commentary by  Howard Eames who is guest posting over several days on parenting  non-regenerate children.  
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Jim continues,
         3. God does hear our prayers. Though God has taught us that  He chooses all who are His before the foundation of the world, He has  also taught us that we should pray, and not only pray, but expect the  answers to our prayers. It is true that God is sovereign and it is just  as true that He answers prayer. In fact, He could not answer prayer if  He were not in control of all things.
Indeed, the sovereign Lord has woven our prayers for our  children into the very fabric of His sovereign decree, and He has  declared without equivocation that all events (the sovereignty of God in  the seasons of life—Ecclesiastes 3) are most beautiful and appropriate  in their time.
God does hear our prayers. We dishonor Him if we are not  eagerly looking for the return of prayers. And yes, waiting on the Lord  is one of the most difficult disciplines in the Christian life. But then  the Psalms seem to teach that the entire Christian walk is one of waiting on the Lord. He works patience, trust, peace, humility, and true dependence into our hearts through our waiting.
We are waiting on His converting grace for our children. In  God's providence, we may be parents faced with the bitter experience of a  child's long-term betrayal. But then this very experience affords us an  opportunity to learn new and wonderful things about God's approach to  forgiveness. We may need to learn to forgive a self-righteous,  blame-shifting, irresponsible, parent-dishonoring and unthankful child,  over and over and over again. But then we are probably learning a  Christ-like love that we so desperately need—a love that is able to look  through the hard outer shell of our unbelieving child and see the  desperately needy person inside! That is a great gift, is it not?
Do we really love our children, or do we simply love our  ideal of what we wanted them to become? Anyone involved in Christian  counseling for any season of time discovers that family members often  don't love each other for who they really are. They love the ideal image  they have created of the other person in their mind.
What our children need from parents, even if they are  in pain, is the knowledge that they are loved unconditionally. This is  the most powerful weapon in the parent's arsenal, and one that God often  uses to touch the hardened conscience of a deeply rebellious spirit  (i.e. a child that is running from God, playing games with God).
It has been our experience (often learned the hard way) that  we have had to learn to stay out of the way of God's working, of God's  answering prayer, and to put our lives at His disposal to be used in  ways often contrary to our own instincts. We are committed to C. John  Miller's proposal:
         Jesus Christ will capture our children, He will free them  from their own prison in a way that will most likely highlight their  unwillingness to submit to Him and our helplessness in changing them. God will not share His glory with another!
This was what I didn't want to hear, but what has become a  healing balm to my soul over time. Reproof and correction are like that,  are they not?
The Lord is often graciously driving you and me to see our  total need for Him! This has been so in my own life as a parent. You've  reached your midnight hour and you are beginning to learn how to beg in  prayer (see Luke 11: 5-8). But then God does promise to provide the  bread of His Spirit, and He promises to supply that abundantly. That  bread might consist of a new wisdom, a new ability to forgive your  child, a new perspective on who your child truly is, a new ability to  communicate with your child as a young adult, compassion, and  desperately needed humility. Is this all bad? Let it never be! You may  even be (as I have been) forced to approach your unbelieving child as  they have grown into adult years as a non-Christian needing Christ's  help rather than an offending son or daughter. But what growth in grace  there is to be had! This is no small victory for a parent in pain. I can  surely attest to that.
God may be weaving a web of love around you and your wayward  child as we speak. He is answering your prayers, yet in ways that you  may not have chosen. A significant part of that web of love may be your  humbling as parents. But then this is most necessary, beloved.  Repeatedly I have had to get the stuffing kicked out of me in my  conflict with my sons. I have had to live year after year with the  tension of the battle. But then I have concluded (as we stand on the  brink of 2005) that much of that tension was only in my mind.
I have been just as much of a wayward father as my sons have  been wayward sons. I have failed so many times. I have been so  inconsistent. I have majored on the minors and minored on the majors,  and my children have all been the sorry recipients of my botched  attempts at parenting them in a godly way. But even if you and I have  failed, the power of God's grace is so much stronger that neither you  nor I ever need to despair.
God may be seeking the rebellious father and mother through  the rebellious child. I am not saying that this is your case, but it  could be, even as it was and is the case with me (I speak for myself and  not for my wife). It has become more than obvious that God has wanted  to change me right along with my sons. I needed to be rescued just as  much as they have needed His rescuing grace! God has worked at this  change by sending me a series of humbling defeats that have lasted these  many years (about ten to be precise).
This is meant to encourage you! You may be blind to your  failures even as I have been blind to mine. God is being gracious to  you. He is committed to your being conformed to His image as expressed  in perfected human nature, the Lord Jesus Christ.