We have not passed that subtle line between childhood and adulthood until... we have stopped saying "It got lost," and say "I lost it."

Sydney J. Harris was a widely syndicated American newspaper columnist known for short, aphoristic observations about everyday ethics and personal responsibility. This line comes from that column-writing milieu—aimed at a general readership and framed as a reflection on maturity rather than a formal philosophical argument. The “subtle line” Harris points to is not a legal age or rite of passage but a psychological shift in how people narrate small mishaps in daily life (like misplacing an object). The wording suggests it was crafted as a standalone epigram within a column rather than as part of a longer literary work.

The quote defines adulthood not as a biological milestone but as an ethical one: accepting agency and responsibility. “It got lost” treats the loss as something that happened to the object, as if by accident or fate; “I lost it” acknowledges one’s own role—carelessness, distraction, or choice. Harris suggests that maturity is marked by a willingness to own consequences, even for small mishaps, and by extension to stop outsourcing blame to circumstance. The “subtle line” underscores that this change is gradual and internal: a shift in self-conception from being acted upon to being an actor accountable for outcomes.