Chapter 4 places love before life. Human beings are born from love, raised by love, matured through love, and meant to return to eternal love. Life only makes sense inside that larger movement.
The chapter stages this through relationships. People begin by receiving parental love, expand into conjugal love, and reach a deeper completion through children’s love. In this framework, marriage and parenthood are not optional accessories but major schools of formation.
It also treats love as an element of life, like sunlight for plants. That makes loveless existence not just painful but metaphysically out of tune with what human beings are for.