The Buddha said, "Sometime, somewhere you take something to be the truth. If you cling to it so much, when… — Thich Nhat Hanh
The Buddha said, "Sometime, somewhere you take something to be the truth. If you cling to it so much, when the truth comes in person and knocks at your door, you will not open it." Guarding knowledge is not a good way to understand. Understanding means to throw away your knowledge. You have to be able to transcend your knowledge the way people climb a ladder. If you are on the fifth step of a ladder and think that you are very high, there is no hope for you to climb to the sixth. The technique is to release. The Buddhist way of understanding is always letting go of our views and knowledge in order to transcend. This is the most important teaching.
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"Breathing in, I calm my body." Reciting this line is like drinking a glass of ice water-you feel the cold, the freshness, permeate your body. When I breathe in and recite this line, I actually feel the breathing calming my body, calming my mind. "Breathing out, I smile." You know the effect of a smile. A smile can relax hundreds of muscles in your face, and relax your nervous system. A smile makes you master of yourself. That is why the Buddhas and bodhisattvas are always smiling. When you smile, you realize the wonder of the smile.
During walking meditation, during kitchen and garden work, during sitting meditation, all day long, we can practice smiling. At first you may find it difficult to smile, and we have to think about why. Smiling means that we are ourselves, that we have sovereignty over ourselves, that we are not drowned in forgetfulness. This kind of smile can be seen on the faces of Buddhas and bodhisattvas.
One day I suddenly saw that the sun is my heart, my heart outside of this body. If my body's heart ceases to function I cannot survive; but if the sun, my other heart, ceases to function, I will also die immediately. We should be able to be our true self. That means we should be able to be the river, we should be able to be the forest, we should be able to be a citizen of any country in the world. We must do this to understand, and to have hope for the future. That is the nondualistic way of seeing.

