Yogācārabhūmi-śāstra, Volume 34 (85)

Original text:从此金刚喻三摩地。无间永害。一切烦恼品粗重种子。其心于彼究竟解脱。证得毕竟种姓清净。于诸烦恼究竟尽中。发起尽智。由因尽故。当来苦果毕竟不生。即于此中。起无生智。彼于尔时成阿罗汉。诸漏已尽。所作已办。无复所作。证得自义。尽诸有结。已正奉行如来圣教。心善解脱。

Explanation: From this vajra-like samādhi onward, the coarse seeds of all categories of afflictions are severed without interruption and forever, and the mind attains ultimate liberation from all afflictions, realizing the ultimate purity of lineage (gotra). At the very moment all afflictions are utterly exhausted, the knowledge of exhaustion (kṣaya-jñāna) of the mundane world arises; because the causes—afflictions—have been exhausted, the future fruit of suffering will never again arise. Simultaneously with the exhaustion of afflictions, the knowledge of non-arising (anutpāda-jñāna) regarding the world of the five aggregates arises. At that time, the third-fruit practitioner becomes a fourth-fruit arhat: all defilements are exhausted, what was to be done has been done, there is no further becoming, the bonds of the three realms are exhausted, the Tathāgata's sacred teachings have been perfectly carried out, and the mind is well liberated.

A fourth-fruit arhat possesses uninterrupted knowledge of exhaustion and knowledge of non-arising. Uninterrupted knowledge of exhaustion means the ability to exhaust all afflictions of the mundane world without interruption, to extinguish all suffering of the three realms, and to know how to escape from the three realms and attain liberation—such wisdom is called uninterrupted knowledge of exhaustion. Knowledge of non-arising means realizing that the world of the five aggregates is suffering, empty, impermanent, and non-self, and understanding that the world of the five aggregates is illusory, and therefore non-arising and unreal—such wisdom is called knowledge of non-arising.