Huayan school
Zen teaching draws from numerous sources of Mahāyāna thought, especially Yogachara, the Tathāgatagarbha sūtras, the Laṅkāvatāra Sūtra, and the Huayan school, with their emphasis on Buddha-nature, totality, and the Bodhisattva-ideal. The Prajñāpāramitā literature as well as Madhyamaka thought have also been influential in the shaping of the apophatic and sometimes iconoclastic nature of Zen rhetoric.