In the book "Mirror, Mirror" by J.D. Robb, the character Jack reflects on the nature of love and understanding within a long-term marriage. He expresses a sentiment that the depth of knowing someone truly emerges only after many years together, allowing for growth and discovery in the relationship. This perspective resonates with Martha, who is encouraged by Jack's observations.

Jack suggests that the journey of deepening love is an adventure in itself. With time, individuals uncover new facets of their partners, revealing complexities that may not be visible at first glance. This ongoing exploration contributes to the richness of their bond, making the process of knowing each other a rewarding experience.