How are things going now? I am relatively new to these forums, but read your heartfelt need for prayer today.
Brother, I hear you. I have 3 children. One is now in heaven, and the other two adult children walked away from the faith after their brother's death. Following this decision on their parts have come so many other bad decisions, so, yes, I am familiar with your pain.
But I also know God is a kind and loving Father. The story of your children is not over yet.
I am comforted by several verses.
2 Peter 3:9 says, "The Lord is not slow in keeping his promise, as some understand slowness. Instead he is patient with you, not wanting anyone to perish, but everyone to come to repentance." He doesn't want ANYONE to perish, but wants EVERYONE to come to repentance. That means your children. Let me tell you briefly of my son who passed away. (He died in his sleep 5 years ago at the age of 25.) He was raised in the church as all of my kids were, but as a young adult, he wasn't too keen on God. In the last year of his life, though, I saw that all turn around. He attended a church (and went to work there), sang in the praise band, read his Bible, tithed, and had praise time with God alone in his apartment regularly. I was so grateful that I got to see this!
My own story is that I was raised in the church and attended church even as an adult, but it was not until I was 47 that I truly was born again and began (for a first time) a relationship with Jesus. I was thrilled to be given the gift of salvation! I also often shook my head and thought, "So much wasted time! 47 years where I could have been walking with the Lord." It was not my parents who led me to Him. It was my sister. She had been born again a few years before, but she had never told me or tried to talk to me about it at the time. When I later asked her why not, she said she knew I wasn't ready. She's right. I wouldn't have been. But my parents had laid the foundation by taking me to church in my formative years. When I came to the Lord, I knew where to go for answers... the Bible, church, pastors, hymns, etc.
You have laid the foundation for your children. You have sown the seed. God will bring people and circumstances into their lives to water and tend that seed and, ultimately, to harvest it.
Two other verses :
Proverbs 22:6 "Raise up a child in the way he should go, and when he is old, he will not depart from it."
I take comfort in that verse. I see it as telling parents to raise their children in the Lord, but please note the last part... and when he is OLD he will not depart from it. There are often a lot of years between raising a child and the child getting old in which he can wander, but I believe God will bring them back.
Also, Isaiah 49:25 (especially the last part of the verse) :
25 But this is what the Lord says:
“Yes, captives will be taken from warriors,
and plunder retrieved from the fierce;
I will contend with those who contend with you, and your children I will save."
I trust Him to be faithful to His word. He IS contending with everyone and everything that is contending with my children's salvation, and He promises to save my children!
Take comfort in the goodness and kindness of your (and their) Heavenly Father!