Remember that in many biblical depictions and illustrations Isaac is depicted as a child during this event. The Bible does not state the age of Isaac along with the reason behind the burnt offering to the Lord. Many interpretations of these quotes could be analyzed in various ways; however, we must also assume that Abraham may have been ready to sacrifice Isaac if need be. I believe that the goal of Abraham was to teach Isaac the ways of the Lord and to show him that sacrifice is needed in order to be a good leader. Since Isaac was going to inherit the largest kingdom of the time, it was a must for Abraham to have Isaac believe in God.