Yogācārabhūmi Śāstra, Volume 34 (43)

Original text:云何复由法性行故。观无常性。谓即所有变异无常。灭坏无常。别离无常。于现在世犹未合会。于未来世当有法性。如实通达。如是诸行。于未来世当有法性。如是等类。名为通达法性无常。

云何复由合会行故。观无常性。谓即如是变异无常。灭坏无常。别离无常。于现在世合会现前。如实通达。如是诸行。于现在世现前合会。如是等类。名为通达合会无常。彼于如是内外诸行。五无常性。由五种行。如其所应作意修习。多修习故获得决定。

Explanation: How does one again contemplate the nature of impermanence by means of the contemplation of the nature of dharmas? Regarding all impermanence of alteration, impermanence of destruction, and impermanence of separation, which have not yet come together in the present life but whose dharma-nature will arise in the future, one realizes them as they truly are. These conditioned formations, whose dharma-nature will arise in the future—categories such as these are called realizing the impermanence of the nature of dharmas.

How does one again contemplate the nature of impermanence by means of the contemplation of coming together? Such impermanence of alteration, impermanence of destruction, and impermanence of separation, which come together and manifest in the present life, are realized as they truly are. These conditioned formations come together and manifest in the present life—categories such as these are called realizing the impermanence of coming together. Regarding the five kinds of impermanence of these inner and outer conditioned formations, one applies attention and cultivates them by means of the five contemplations, as appropriate; through repeated cultivation, the mind gains certainty regarding the nature of impermanence.