Just one of these Sanskrit Mahayana sutras, the Vimalakīrti Nirdeśa Sūtra includes a chapter to the "Dharma gate of non-duality" (advaya dharma dvara pravesa) which is stated being entered as soon as one particular understands how various pairs of opposite extremes are for being turned down as types of greedy. https://www.facebook.com/NonDualTeachers/