In this chapter Francisco's new brother is born, and contacts a deadly disease, but miraculously survives
In his memoir, Sampson Davis describes the experience of growing up in Newark. He tells us that he came from an impoverished background, and that he faced enormous difficulties and obstacles in order to become a doctor. However, even after he became a doctor, Davis believed it was important for him to come back and become a beacon of hope for other people who had grown up in the same difficult environment. He wanted to come back and show young people that it was possible for them to change their lives through education.
Answer: Love for each other.
The fact that both people gave up something or special value to the other for love profoundly states that they are willing to make great sacrifices for each other. Their poverty, wisdom, and possessions do not hold great value. It was poverty that made them sacrifice. Wisdom did not play a role. And possessions are of no regard to the characters.