We create a persistent alienation from ourselves, from others, and from the world by fracturing out present experience into different parts, separated by boundaries. We artificially split our awareness into compartments such as subject vs. object, life vs. death, mind vs. body, inside vs. outside, reason vs. instinct. The result of such violence, although known by many other names, is simply unhappiness. Life becomes suffering, full of battles. But all our battles in our experience – our conflicts, anxieties, sufferings, and despairs – are created by the boundaries we misguidingly throw around our experience.
Ken Wilber – No boundary