People
Memory is a child walking along a seashore. You never know what small pebble it will pick up and store away among its treasured things.
— Pierce Harris

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Memory is compared to a child strolling a beach, picking up whatever small pebble catches their eye. You can't predict which little detail will get kept, and those chosen bits become treasured in ways that seem random.
Context reviewed