Soldier of The Cross, children must be trained so they can then be taught.
The Bible says: Foolishness is bound in the heart of a child; but the rod of correction shall drive it far from him.
Proverbs 22:15
No parent feels successful except during the times when the child appears to be perfect, according to the parent's concept of perfection. The problem is, there is no guaranteed parenting manual except for God's Word.
Over the years, I have heard mothers say that there is not a chance their children would lie to them. That is a foolish statement. Even the best children lie although prayer will uncover the matter.
On other occasions, I have heard parents say that their child can be trusted in situations where others cannot be trusted. That may or may not be true. The younger the child, the deeper the privacy. Some of the things that surface in teen years have been there all along - just hidden.
Christian parent, understand one thing. You may have taught everything you could, but your child is a separate individual who must make his or her own decision for the Lord. You can not make that decision for your child. I have seen young children manipulate their parents by saying the appropriate Christian thing, just to gain control over the immediate matter.
No one has ever been a perfect parent. The issue is, the child rearing must be done in prayer. Do you have an unbelieving spouse? Make sure you do not compromise and support the activity and behavior of your children, especially teenagers, if the behavior is sensuous or otherwise ungodly. There is no need to condemn or even confront the child about some matters, as you will not be able to control the heart of a young adult who is wandering into clearly dangerous territory.
Most importantly, do not approve of things you know are not right. With older children, confrontation is rarely productive. I have worked with teenagers for forty three years. Believe me, you must live before them, pray specifically, and, while you should nbot argue about the issue, do not compromise and do not ratify the ungodly.
If you compromise, you sell your children down the river.