It is understandable that you may feel despondent about your wayward child sometimes! It is easy to give up hope... and to want to give up on EVER reaching that child...DON'T!! Do you realise in how much trouble you would be if God gave up on you??? What would you do if God says to you: "Sorry ....., you have just messed up one time too many for Me to forgive you and to let you back in. Go now, and NEVER come back!".... but then, God doesn't do that, does He?
We are not allowed to do that to our own kids either... (Oh, I SOOOOO know about the desire to just throttle the living daylights out of them!!!)
BUT: Today God is saying to you.. DON'T GIVE UP ON YOUR CHILD... GOD HASN'T!! Keep praying... and keep loving him/her... GOD IS GOING TO BREAK INTO YOUR CHILD'S LIFE IN A MIGHTY, MIGHTY WAY and He will turn that child around in a powerful way. HANG IN THERE... IT IS SURELY COMING!!!
And when you look at your child's life with the natural eye and things just seem to get worse by the second... try to remember that you are looking at the waves and GET YOUR EYE BACK ON THE SAVIOUR!!! Realise that what you are seeing is a child working on his/her testimony... and PRAISE GOD FOR WHAT HE IS DOING WHERE YOU DO NOT SEE!!!
God is busy changing your child even now while you are reading this... Our God is a Covenant Keeper... and if you are in covenant with Him it also includes your children and grand-children. Why don't you trust God with the God-sized stuff and just rest in Him... He WILL NOT DISAPPOINT YOU!