'This is the third Dharma talk offered by Thay in the Open Mind Open Heart Retreat, given in the War Memorial Gym of the University of British Columbia in Vancouver, Canada, on Saturday, August 13th, 2011. Thay speaks about the steps in the practice of mindfulness of breathing: 1) aware of the in and out breath, 2) following the in and out breath, 3) aware of body, 4) releasing tension in the body, 5) recognizing joy, 6) recognizing happiness, 7) aware of painful feelings, 8) embracing painful feelings, 9) recognizing mental formations, 10) invigorating the mind, 11) concentrating the mind, 12) liberating the mind. Thay continues to share about the Three Doors of Liberation: 1) emptiness, 2) signlessness, 3) aimlessness. Emptiness does not mean non-existence. A glass can be empty or full of tea, but in order to be empty or full the glass needs to be there. So emptiness does not mean non-existence. This glass is empty of tea, but it is full of air. So it is helpful for us to ask, 'Empty of what?' To be empty is always to be empty of something. When we contemplate a flower like this, we see the flower is full of everything: the cloud, the sunshine, the Earth, time, space, the gardener---everything has come together to help the flower to manifest. Why do we say it is empty? It is empty of only one thing: a separate existence. A flower cannot be by herself alone. A flower is full of non-flower elements. It is clear that the flower has to be interbe with everything in the cosmos. She cannot be by herself alone. To be by oneself alone is impossible. So we begin to see the interdependence of everything. He uses the example of a match which requires the action of us striking it for a flame to manifest. In life we are the same: when we ask 'Where do we come from?' or 'Where are we going?' we see that we do not come from anywhere. When conditions come together sufficiently, I manifest. My nature is the nature of no coming and no going. When conditions are no longer sufficient, I just stop manifestation and wait for a chance to manifest again. My nature is no coming, no going.'