Psalm 71:17 “Since my youth, God, you have taught me, and to this day I declare your marvelous deeds.” What a blessing many children experience when they are raised by Christian parents in a Christian home.  How sad it is when children do not experience growing up in such an environment.  David experienced the former and was extremely appreciative.  It is the responsibility of all parents to teach and train their children the truths of God as they become parents.  Praise God if you have been such a child or such a parent.