首楞嚴義疏注經 7.192

7.192

變易不常，假新換故，觸境之處與想相應，即便受生。新故亂想者，因即不循仁義，厭故取新，但徇己情，愛彼忘此，假託不實，變受異身。又化生初質風觸即堅，既無本形，因觸而立，此取轉受異身，名之為化，故云轉蛻也。羯南，云硬肉。

Mutation is not constant, borrowing the new to replace the old; wherever they touch sensory objects, corresponding with their thought, they undergo birth immediately. As for 'chaotic thoughts of the new and the old,' the cause is failing to follow benevolence and righteousness, wearying of the old and grasping at the new, merely indulging one's own desires, loving that and forgetting this, borrowing unreally, and changing to undergo different bodies. Furthermore, the initial substance of transformation-birth hardens upon the touch of wind; having no original form, it is established through touch. This takes undergoing different bodies as what is called transformation; hence it is said, 'molting.' 'Ghana' means 'hardened flesh.'