Thought from Today's Old Testament Passage:
Proverbs 22:6: "Train up a child in the way he should go, even when he is old he will not depart from it." Does this verse furnish us with an iron-clad guarantee that all the children of conscientious, God-fearing, nobly living parents will turn out to be true servants of God?… One might construe the verse that way, perhaps; but it is more than doubtful that the inspired Hebrew author meant it as an absolute promise that would apply in every case. These maxims are meant to be good, sound, helpful advice; they are not presented as surefire promises of infallible success.
Children are to be accepted as sacred trusts from God; they are to be trained, cherished, and disciplined with love; and they are to be guided by a consistent pattern of godliness followed by the parents themselves…. Parents who have faithfully followed these principles and practices in rearing their children may safely entrust them as adults to the keeping and guidance of God and feel no sense of personal guilt if a child later veers off course. They have done their best before God. The rest is up to each child himself.
Gleason Archer, Encyclopedia of Bible Difficulties (Grand Rapids, MI: Zondervan Publishing House, 1982), pp. 252-253.