We understand biblical principles for rearing children, and we know some of the mistakes that we have made, but now our children are more than half grown.
Wisdom is especially important when dealing with a child who is nearly grown.
Acting from pent-up emotions, rather than from wisdom, can precipitate a difficult situation into a disastrous one. Actions must not be controlled by resentment, bitterness, anger or wrath. That is, you cannot change them. But God can. The biblical principle is for you to let God change your feelings toward your child.