The Buddha said: "When you fix your heart on one point, then nothing is impossible for you". The heart easily runs away, so it is necessary to concentrate it by means of breath-energy. Breath-energy easily becomes rough, therefore it has to be refined by the heart. When that is done, can it then happen that it is not fixed?
Translators of The Secret of the Golden Flower are Richard Wilhelm and Cary F. Baynes. If you missed any posts in this series, please utilize the Golden Flower label below.