《幼学琼林·卷四·释道鬼神》
 飞锡 、 挂锡 ，是说僧人的出游和停留； 导引 、 胎息 ，是说道士的修身养性的方法。
飞锡挂锡，谓僧人之行止；导引胎息，谓道士之修持。
Flying Tin and Hanging Tin refer to the monks' travels and stays, while Guiding and Embryonic Breath refer to the Taoists' methods of cultivating their minds and bodies.