From the Zen Peacemakers website, Wendy Egyoku Nakao Roshi
In Three Tenets practice, Not-knowing trains you to continually set aside fixed points of view. I describe not-knowing as a flash of openness or a sudden shift to being present in the moment. This dropping away of the things you have relied upon for a sense of stability may lead you to examine what you believe is your center, to take shelter in the place before anything arises, a place of emptiness and profound silence, a place of the deepest rest where self-interest has not yet entered. This is not a void, but rather a darkness where things are not yet differentiated or seen. You yourself can go to the darkness and become like an empty vessel, empty of points of view and preferences. An empty vessel refuses nothing and receives everything that is coming at it from all directions. By practicing in this way, you can create more space to accommodate your own reactivity and the points of view of others.
Bearing Witness: The practice of bearing witness is to see all of the aspects of a situation including your attachments and judgments. You cannot live solely in a state of not- knowing, because life also asks that you face the conditions that are coming at you by being present to them. When you bear witness you open to the uniqueness of whatever is arising and meet it just as it is. When combined with not-knowing, bearing witness can strengthen your capacity for spaciousness, thus enabling you to be present to the very things that make you feel as if you have lost your center. It can strengthen your capacity to listen to other points of view, thus allowing a more nuanced picture of a situation to emerge.
The third tenet is Taking Action. It is impossible to predict what the action in any situation will be, or the timetable for when it will arise or what might result from it. The underlying intention is that the action that arises be a caring action, which serves everyone and everything, including yourself, in the whole situation.
Sometimes the action is as simple as continuing on with the practice of the first two tenets of not-knowing and bearing witness; the very practice of the Three Tenets is itself a caring action. And though the action that arises from the engagement of not-knowing and bearing witness is spontaneous and often surprising, it always fits the situation perfectly.
Training with the tenets is a matter of taking a backward step again and again and continually discerning your internal processes in the midst of acknowledging what is happening around you. An effect of ongoing and consistent practice of the Three Tenets is that when you lose your sense of center and fall into reactivity, you also regain your center more quickly. And when you continually perform this practice in the midst of all the activities of your daily life, the practice will be readily accessible to you during the most challenging circumstances.