Grandchildren

As Moses addresses the people he makes an amazing statement.  These people were the children of the people that had come out of Egypt and were given the Ten Commandments at Mount Sinai.  Yet Moses says to the people in front of him that day these words, "The Lord our God made a covenant with us at Horeb.  It was not with our ancestors that the Lord made this covenant, but with us, with all of us who are alive here today.  The Lord spoke to you face to face out of the fire on the mountain."  Deuteronomy 5:2 - 4.
What does Moses mean when it says that it wasn't with our parents but it is with us that God made the covenant?  The covenant that was given at Horeb was given to each generation.  Every generation must renew the covenant with God.  It is not enough that our parents believed but we also must take the covenant to be between God and us.  God has no grandchildren.  Each person must come into a personal relationship with God.  We are not God's children because our parents were God's children.