Yogācārabhūmi Śāstra, Volume 34 (35)

Original text:诸变异行现见增上作意力故。于内外事如其所应。以变异行观察一切是无常性。由是因缘于诸变异无常之性。现见不背。不由他缘非他所引。随念观察审谛决定。即由如是所说因缘。说名现见增上作意。即由如是现见增上作意力故。观察变异无常性已。彼诸色行虽复现有。刹那生灭。灭坏无常。而微细故。非现所得。

Explanation: Because of the power of intensified attention (adhimātra-manaskāra-bala) that enables one to directly observe these ever-changing volitional formations, the observation of internal and external matters accords with the nature of impermanence and change; from the perspective of the changes of volitional formations, one observes that all dharmas are impermanent. Due to this cause and condition, regarding the impermanent and changing nature of volitional formations, one can directly observe it without contradicting its nature of change and impermanence. The changes of these formations do not arise from other conditions and are not brought about by external causes and conditions.

Regarding the observation and confirmation of the impermanence of all internal and external dharmas, one can carefully examine them in accordance with one's own power of intensified attention, and finally the mind attains certainty. Because of such cause and condition, it is said that direct observation is the intensified attention of direct perception. That is to say, because of such power of intensified attention of direct perception, after observing the impermanent and changing nature of volitional formations, although those formations of form still exist, one knows that they are all dharmas subject to arising and ceasing in every instant, impermanent and perishing. Because these dharmas are extremely subtle, they cannot be observed directly in the present moment.