Children are happy because they don't have a file in their minds called "All the Things That Could Go Wrong."

The line contrasts a child’s present-mindedness with an adult’s habit of rehearsing danger. By imagining the mind as a computer with a stored “file” of potential catastrophes, it suggests that much unhappiness comes not from immediate reality but from anticipatory narratives—worry, rumination, and defensive planning. The quote implies that children’s joy is partly a cognitive innocence: they have not yet accumulated (or learned to consult) an internal catalog of worst-case scenarios. As a spiritual-psychological observation, it encourages reclaiming some of that openness by noticing fear-based mental scripts and choosing attention, trust, and play over compulsive forecasting.