Clutter is anything that gets in the way of what matters most to you. It can certainly be material—unwanted trinkets and clothes that no longer fit—but clutter also can be spiritual, emotional, and psychological.
Regrets, anger, frustrations, anxieties, envy, and other nonproductive emotions may be depleting your limited energy. And, unfortunately, mental clutter doesn’t magically disappear; the only way to alleviate mental clutter is to deal with it.
Via Pamir Kiciman, God Is.