Accepting, even welcoming, the deep loneliness of the human condition: letting someone or some thing be separate and unique. Letting myself be equally unique, no matter how wide the diversity may be. When I set a boundary, I am open to any outcome; I accept people, events and myself as they simply are.
Let yourself become unconnected to a person, situation, group, or idea that imprisons you; let it be separate without judging it or defending yourself. It will feel lonely, but just hang with that for a little while.
