This excerpt is copyrighted material, please do not use or copy without written permission from Nitartha Publications. This is an excerpt from the sourcebook we use in our Buddha Nature course. This course is part of Level 4, along with Cittamatra. The teachings on Buddha Nature present an overview of the Tathāgatagarbha, or Buddha Nature tradition, the view of the luminous essence of awakening, the heart of goodness shared by all beings. Our exploration will rely on the key section of Uttaratantra of Maitreya (ca. 4th century) which establishes Buddha nature through three reasonings, its ten facets, nine analogies and five reasons why it is necessary to