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I’m trying to keep my mind free of things that don’t matter.
— Ann Newton ‧ Shadow of a Doubt

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker describes a deliberate effort to clear the mental clutter, keeping only what actually matters in view. It's a small statement of mental housekeeping, suggesting that a calm mind comes from choosing what to leave out rather than adding more.
Context reviewed