The quote expresses the profound experience of a mother's love when she holds her second child for the first time. Initially, she doubts her ability to love another baby as deeply as she loves her first, but that doubt is erased at the moment of connection. It conveys a sense of surprise and joy as a hidden capacity for love is revealed, demonstrating that love can expand rather than divide.

This revelation leads her to an important realization: the emotional landscape of her heart has changed. The addition of a new child creates a fulfillment she never thought was possible; her heart grows to accommodate love for both children. The sentiment emphasizes that love is not a finite resource, and without the second child, her life would feel incomplete and lacking the fullness of that love.