成唯識論演祕 6.40

6.40

此遮外難。外難意云：第四定中諸地皆同離遍淨染，退後重得第四定時，無想天染亦必離矣。後生何不即在彼天住下三處？疏答意云：若離染同令生彼者，若爾，彼天應無九處，離染同故；九處既差，明離染同，熏修而異，雖復重得第四靜慮，其無想定未暇熏修即便命終；生彼下三，竟有何失？

This refutes an external objection. The intention of the external objection is: 'In the fourth dhyāna, all levels are alike in being free from the attachment to Śubhakṛtsna. When one regresses and re-attains the fourth dhyāna, attachment to the heaven of non-conception must also be abandoned. When later born, why are they not right in that heaven instead of abiding in the lower three places?' The Commentary's intended reply is: 'If freedom from attachment being the same caused them to be born there, then that heaven should not have nine abodes, because the freedom from attachment is the same. Since the nine abodes are distinct, it is clear that while freedom from attachment is the same, cultivation through perfuming is different. Although they re-attain the fourth dhyāna, they have not yet had the leisure to cultivate the absorption of non-conception before dying; so what fault is there in being born in the lower three?'