Chapter 3 (If you want to change the world, measure others by the size of their hearts) William in this section with a story about how a coach, by stimulating the emotions of a skinny young man who was afraid of swimming, made him the first swimmer in the group. be yourself In William's second story, it is about a thin and thin man whom everyone thought at first sight to be a sick disabled person, but this was not the case. This person was a proud man of war, who had fought the enemy alone to save two people, and his story Everyone said At the end of this chapter, William comes to the conclusion that when the criterion of people's worth is actions, motivation, will, as a result, you will attract such people and they will have an effect on you, so the value of each person is determined by the breadth of his heart.