The Śrimālādevi-siṁhanāda sūtra reinterpreted the meaning of Emptiness presented in the Prajñāparamitā in terms of Tathāgatagarbha, focusing on the relationship between the intrinsically pure mind and the extraneous defilements which impede the awareness of this true nature of mind. In the Aṣṭasāhasrikā and the Vimalakīrtinirdeśa pure mind was equated with Emptiness, denying any ground to the phenomenal world. In Tathāgatagarbha literature the equation of intrinsically pure mind with Emptiness was retained but this mind became the ground for all phenomena, both conditioned and unconditioned, interpreting Emptiness as a positive and affirmative apprehension of the Dharma—nature, represented in the intrinsically pure minds of all living beings. Dharma—nature itself was equated with Tathāgatagarbha and Ekayāna.