" We can learn to break the habit of accumulating and perpetuating old emotion by flapping our wings, metaphorically speaking, and refrain from mentally dwelling on the past, regardless of whether something happened yesterday or 30 years ago. We can learn not to keep situations or events alive in our minds, but to return our attention continuously to the pristine, timeless present moment rather than be caught up in mental movie-making. "

― , Declutter Your Mind: How to Stop Worrying, Relieve Anxiety, and Eliminate Negative Thinking (Mindfulness Books Series Book 1)