The first recipe for happiness is: Avoid too lengthy meditation on the past.

Maurois’s aphorism treats happiness less as a stroke of luck than as a discipline of attention. “Too lengthy meditation on the past” points to rumination—replaying regrets, injuries, or lost opportunities until they harden into identity. The counsel is not to forget history or deny memory, but to avoid letting retrospective thought monopolize the mind and drain the present of vitality. Implicitly, happiness requires a forward-leaning posture: learning what the past can teach, then releasing it so that action, relationships, and possibility remain available. The line also suggests a practical hierarchy: before seeking grand philosophies, begin by managing mental habits that quietly sabotage contentment.