佛遺教經論疏節要 1.220

1.220

《易》曰「人道惡盈而好謙」，《老子》曰「柔弱者生，剛彊者死」，故知憍慢非世俗所宜。降身行乞者，摩頭等五悉是降身，舉要而言指歸行乞。

The Yijing says: "The human way detests fullness and loves modesty." Laozi says: "The supple and weak survive; the rigid and strong perish." Thus we know that pride and arrogance are not suitable for the mundane world. Regarding "humbles their person and practices begging": touching the head and the other five practices are all humbling the person; to speak of the essentials, they all culminate in practicing begging.