TV
He won’t be a boy forever. And, winter is coming.
— Catelyn Stark • Game of Thrones

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Catelyn warns that childhood won't last. Her second sentence, 'winter is coming', turns time into a coming season of hardship. Together they tell a listener to prepare for a harder chapter. The mood is calm but quietly ominous.
Context reviewed