食氣者必謂吹呴呼吸,吐故納新也*
Who nourishes himself/herself from vapours has to be called the blowing and yawning breathing, spitting out the stale and receiving the fresh.
其息深深。真人之息以踵,眾人之息以喉**
Their breathing came deep and silently. The breathing of the true man comes from his heels, while men generally breathe from their throats.
得胎息者,能不以鼻口噓吸***
Who obtains the fetal breathing can, without his/her nose or mouth, slowly breathe out and in.
Inhaling and exhaling, it is also a question of order. Internal breathing tends to reverse it, as the Chinese word for breathing, 呼吸, literally means exhaling and inhaling.