Tathāgatagarbha Sūtra
The Tathāgatagarbha Sūtra is an influential and doctrinally striking Mahāyāna Buddhist scripture which treats of the existence of the "Tathāgatagarbha" (Buddha-Matrix, Buddha-Embryo, lit. "the womb of the thus-come-one") within all sentient creatures. According to the Buddha, all sentient beings are born with buddha-nature and have the potential to become a Buddha. Physical and mental defilements of everyday life act as clouds over this nature and usually prevent this realization. This nature is no less than the indwelling Buddha himself.