Yogācārabhūmi Śāstra, Fascicle 9 (Twelve Links of Dependent Origination)

(4) Original text:身行云何。谓身业。若欲界若色界。在下名福非福。在上名不动。语行云何。谓语业。余如前应知。意行云何。谓意业。若在欲界。名福非福。在上二界。唯名不动。

Explanation: What is bodily formation (kāya-saṃskāra)? Bodily formation refers to the karmic actions created through the body—either creating karmic actions of the desire realm, or creating karmic actions of the form realm. In the formless realm, no bodily formations are created, because the devas of the formless realm have no body. Who creates the karmic actions through the body? It is the manas that causes the six consciousnesses to create karmic actions through the material body. In the lower desire realm, meritorious formations (puṇyābhisaṃskāra) and unmeritorious formations (apuṇya-abhisaṃskāra) are created; in the upper form realm, what is created is the immovable formation (āneñjya), because sentient beings in the form realm possess profound meditative concentration (samādhi); since the mind does not move amid sense objects, the body, being under command, also does not move, and thus no bodily formations are created. Under whose command is the body? The body is under the command of the manas; if the manas's mind does not move, the mind consciousness does not move, the body consciousness also does not move, and the body does not move.

What is verbal formation (vāk-saṃskāra)? Verbal formation refers to the karmic actions created through the mouth, that is, verbal karma. In the lower desire realm, the verbal formations created are called meritorious formations and unmeritorious formations; in the upper form realm, there is no movement and none are created. Because the minds of the devas in the form realm are pure, endowed fully with pure conduct (brahmacarya), their minds do not move amid sense objects; since the mouth is under the command of the mind, the mouth does not move and there are no verbal formations. In the formless realm there are no verbal formations, because there is no body and no mouth. What is mental formation (citta-saṃskāra)? Mental formation here refers to the karmic actions created by the mind consciousness. In the desire realm, the mind consciousness creates meritorious formations and unmeritorious formations; in the upper form realm and formless realm, what is created is the immovable formation, because when the manas's mind is pure and unmoving, the mind consciousness is pure and unmoving, as the mind consciousness is under the command of the manas.

Original text:眼识云何。谓于当来依止眼根。了别色境识。所有福非福不动行所熏发种子识。及彼种子所生果识。如眼识如是。乃至意识。应知亦尔。由所依及境界所起了别差别。应知此于欲界具足六种。色界唯四。无色界唯一。受蕴云何。谓一切领纳种类。想蕴云何。谓一切了像种类。行蕴云何。谓一切心所造作意业种类。识蕴云何。谓一切了别种类。如是诸蕴。皆通三界。

Explanation: What is the eye consciousness? The eye consciousness is the consciousness that relies on the eye faculty to discern forms as sense objects; it is the seed consciousness perfumed and deposited by all meritorious formations, unmeritorious formations, and immovable formations, as well as the retributive consciousness born from those deposited seeds. The eye consciousness is thus; so too should it be known for the mind consciousness up through the rest. Due to the differences in discernment arising from what is relied upon and the sense-object realms, it should be known that in the desire realm all six are complete—form, sound, smell, taste, touch, and dharmas; in the form realm there are only four—form, sound, and touch; in the formless realm there is only one—the dharma object of meditative concentration.

What is the aggregate of feeling (vedanā-skandha)? The aggregate of feeling is the entire range of types of reception of dharmas—painful feeling, pleasant feeling, and neither-painful-nor-pleasant feeling. What is the aggregate of perception (saṃjñā-skandha)? The aggregate of perception is the entire range of types of discernment of the images of sense objects, that is, the discernment of the six consciousnesses; of course, the seventh consciousness also has the function of discernment. What is the aggregate of volitional formations (saṃskāra-skandha)? The aggregate of volitional formations is the entire range of types of mental karma created by the mind, that is, the mental factor of volition (cetanā) of the six consciousnesses; of course, the seventh consciousness also has the mental factor of volition and also has formations. What is the aggregate of consciousness (vijñāna-skandha)? The aggregate of consciousness is the entire range of types of discernment of the dharmas of sense objects, that is, the discernment of the six consciousnesses; the seventh consciousness also has discernment. These aggregates of feeling, perception, volitional formations, and consciousness all pervade the three realms; they exist in all three realms, because in the desire realm, form realm, and formless realm there is the mind consciousness, and also the seventh consciousness; both consciousnesses have the functions and operations of feeling, perception, volitional formations, and consciousness.