Chapter 1 treats true love as the deepest explanation for why God created at all. Creation is not framed first as a display of power or intelligence, but as the overflow of a love that requires an object partner.
The chapter also defines true love by its repeated self-giving. It gives, gives again, and forgets its giving, which is why it can create oneness where selfish love only creates division.
That movement reaches its intended earthly form in the family. Adam and Eve were meant to be the absolute objects of God’s love, and their failure is described as the breaking of the bond of heart that should have made the true family love’s first dwelling place.