Our experience of life can become entangled in our thoughts and, effectively, hijacked by them. We might replay or imagine events in our minds as we walk down the street, oblivious to the pleasant warmth of the sun on our face. We may well arrive at our destination having missed much of the experience of our walk. Worse, if we've been lost in emotionally charged thoughts, then we may be left with negative feelings like sadness, anxiety, or regret. If this can happen during a walk to the store, imagine the implications of living most of your life disconnected in this way.