The Buddha's teachings are only effective once they have been deeply instilled into the manas.

Before attaining realization, the Buddha's teachings must also be steeped into the manas. When the manas is cultivated by wholesome dharmas, it will undergo change, and both body and mind will transform—all the more so at the very moment of attaining realization; that is what is truly called the power of meditative absorption (samādhi). If, in the process of studying the Buddha's teachings, nothing is steeped into the manas—only the mind consciousness absorbing and understanding knowledge—then the manas will remain as it has always been, and there will be no transformation of body, mind, and world. In that case, the elimination of self-view and the attainment of realization will remain forever out of reach. Even before attaining realization, if the manas has been cultivated but not to a sufficient degree, one still cannot eliminate self-view and attain realization. Therefore, for the transformation of body and mind, for the transformation of bodily, verbal, and mental actions, for the elimination of self-view, and for seeing one's true mind and awakening to one's true nature, the manas must be steeped and dyed to a considerable degree; it is not enough for the manas to change only a little. To be utterly reborn, the manas must be thoroughly transformed, eliminating the manas' afflicted and defiled mind, and severing the five grades of thought-delusion afflictions of the desire realm. Only in this way, when karmic seeds are stored in the eighth consciousness, can one be assured in future lives of not falling into the three evil paths and of being reborn into the wholesome paths of humans and gods. There are still others who cling stubbornly to the notion that realization is attained by the mind consciousness, resisting the idea that realization is attained through the manas—obstinately unyielding, stubborn to the very end. Such people are truly beyond remedy.