The mind consciousness thinks as it thinks, and the manas does as it does.

All dharmas leave nothing to be attained. The Heart Sutra says, "Because there is nothing to attain, bodhisattvas"; the Diamond Sutra says that it was because the World-Honored One had nothing to attain in His mind that he was given the prediction by the ancient Buddha Dīpaṃkara. Some people then think: since all dharmas leave nothing to be attained, with no self and no possession belonging to a self, then there is no need to strive at all—let even thinking come to a halt, and simply be non-active (wu-wei). When thinking this way, the mind feels very light and at ease, but this state cannot last very long; very soon one becomes active again, and when encountering conditions, events, or people, one is not non-active in the slightest. 

This is because, before the empty nature of all dharmas has been realized, the emptiness that the mind consciousness conceives of has no power whatsoever and cannot be the master at all; one remains as active as one always was, unable to become empty in the slightest. The mind consciousness may wish to be still and non-active, yet it cannot be the master of the body of the five aggregates (pañcaskandha); the manas, which is the master, has its pursuits and wants to engage in some activity, and the mind consciousness must comply with it, having no way to do anything about it. Therefore, even though the mind consciousness understands some principles, the manas does not understand them, and no substantive problem can be resolved. Thus, the mind consciousness attaining the fruits or awakening to the true mind fundamentally changes nothing: afflictions are still afflictions, ignorance is still ignorance, and birth-and-death is still birth-and-death. Only by settling the manas—the one who acts as master—can all problems be solved and a heaven-and-earth-transforming change take place.