... continue to love each other, something I discover is not an automatic state but must be worked at, like an ever-changing tactical problem, though I would never describe it that way to my beloved
The quote emphasizes that love is not something that happens automatically but requires ongoing effort and attention. It suggests that maintaining love is like solving a complex, evolving challenge that needs constant effort and adaptation.
The speaker reflects that, despite viewing love as a dynamic process, they would choose not to describe it as a tactical problem to their loved one. Instead, they see love as a continual, active pursuit that must be nurtured and worked at to endure over time.