Also, central to the Lankavatara is the identity of the "alayavjnana" with the "tathagata-garbha" and the "Lankavatara"s central message that the "tathagata-garbha" is what makes possible the turning inward ("paravritti" or "paravrtti") of awareness to realize the Buddha's psychological transformation in practical life, while the "tathagata-garbha" system was unknown or ignored by the progenitors of the Yogacara system.