People
For the happiest life, days should be rigorously planned, nights left open to chance.
— Mignon McLaughlin

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
This offers a tidy formula for contentment: keep your daytime hours organized and predictable, but let the evenings stay loose and open to whatever happens. The idea is that structure and spontaneity aren't opposites, they just work best when kept to their own separate territory.
Context reviewed