The quote "That was then. This is now" from Linda Lael Miller's book "Big Sky Mountain" emphasizes the notion of change and evolution over time. It suggests a transition from past experiences or circumstances to the present moment, highlighting how time can alter perspectives and realities. This idea is central to many personal journeys, where past events shape individuals but do not define their current identities.

In "Big Sky Mountain," the characters likely navigate their own transformations, reflecting on how their histories influence their current lives and relationships. Miller's storytelling may illustrate the challenges and growth that come with embracing the present while acknowledging the lessons learned from the past. This theme resonates with readers who are encouraged to reflect on their own journeys of change.