A dad took his son, then about five years old, and lifted him to the top of the wall about 42 inches off the ground. Then he said, “Now, son, jump and I’ll catch you!”  The little boy looked down and hesitated. “Come on, jump! I’ll catch you.” The lad looked into the face of his father and then jumped, but as he did so the dad withdrew his arms and the little boy landed in a crumpled heap on the ground—shocked, and crying. “Look,” said the dad, “this is to teach you an important lesson—you can never trust anybody, ever, not even me. Don’t forget it.”