Grasping at dharma-objects is all governed by the manas

The seven consciousnesses all have a grasping nature toward the dharmas they contact and crave, but ultimately it is only through the manas' grasping that they are collected as karmic seeds and passed on to future lives. The grasping of the six consciousnesses is also initially initiated and determined by the manas. When the manas engages with the six sense objects, if it has an interest in investigating the dharmas therein, it will give rise to the six consciousnesses to discern them. After the six consciousnesses discern, feeling and craving arise, and afterward there may be mental actions of grasping. After the manas discerns the six sense objects discerned by the six consciousnesses, feeling and craving arise, and afterward mental actions of grasping are produced; thus the six consciousnesses crave without cease.

The consciousnesses that grasp the marks of dharmas are mainly two: the mind consciousness and the manas. The five sense consciousnesses also do so, but their function is minute and can be neglected. When the mind consciousness engages with mental sense objects, it is the mind consciousness that grasps the marks of dharmas; afterward, based on the mind consciousness's discernment and its craving and grasping, the manas also gives rise to mental actions of craving and grasping. After the manas grasps, the result manifests. Before the mind consciousness discerns the marks of dharmas, the manas also has contact and grasping; it is only that the manas does not thoroughly know the marks of dharmas, so the purpose of its grasping the marks of dharmas is to have the six consciousnesses discern them, with the mind consciousness acting as advisor, and then make the final decision. As for the marks of the five sense objects, the five sense consciousnesses also grasp them, but the five sense consciousnesses have no decision-making power, and their grasping is extremely subtle. When wisdom is insufficient, it is extremely difficult to observe the mental actions of the five sense consciousnesses, and it is also extremely difficult to distinguish clearly between the five sense consciousnesses and the mind consciousness. The mental factors of the five sense consciousnesses are generally bound together with those of the mind consciousness and the manas and cannot be observed, so they are overlooked.