It is only on the basis of what He tells us that we are truly able to determine how best to train our children and how they can achieve their greatest potential for themselves, for our society, and for the Lord. Many child psychologists teach that children are basically good, but the Bible teaches otherwise. But a child left to himself bringeth his mother to shame. Because of the sin nature inherent in all mankind received from Adam, we are more likely to be influenced by the bad than by the good. It is easy to let children do that which is wrong just leave them to themselves, and they will express their true, sinful natures.
Training involves more than just teaching.
Similarly, we are to train children in the true way, spiritually and morally, giving no options. Children who are merely taught can hear other teaching and easily depart from the truth because of their sinful natures and their bias against God, as expressed in that nature. Thus, to cause children to be influenced for good, much work must be done. In other words, we must work diligently to train them in truth, condemning error for what it is. Any parent knows that when a restraining influence is taken from children, it doesn't take long for them to start doing things, which are not right, thus expressing their sinful natures.