釋禪波羅蜜次第法門 5.24

5.24

二、轉緣者，初數於息，覺息微微，當置數息，便隨於息，任運出入。若心欲靜，便捨隨，凝心止住。心若闇忽，即便靜照色息。心若浮動，即便捨觀歸數及隨止也，是故名還。心不馳蕩，凝神寂慮，故名為淨。行者若能如是善巧攝錄，心則易定。

Second, regarding the shifting of conditions: initially counting the breath, when one perceives the breath becoming subtle, one should set aside counting the breath and simply follow the breath, letting it flow naturally in and out. If the mind tends toward stillness, one then abandons following and concentrates the mind to bring it to a halt. If the mind becomes dark and negligent, one then quietly illuminates the material breath. If the mind becomes agitated and scattered, one then abandons contemplation and returns to counting, following, and stopping; therefore it is called "turning back." The mind does not run wild, condensing the spirit and quieting contemplation; therefore it is called "purification." If a practitioner can skillfully gather and regulate [the mind] in this way, the mind will easily settle into absorption.