About the Mahasanghikas: The Mahāsāṃghikas advocated the transcendental and supramundane nature of the buddhas and bodhisattvas, and the fallibility of arhats.[14] They held that the teachings of the Buddha were to be understood as having two principle levels of truth: a relative or conventional (Skt. saṃvṛti) truth, and the absolute or ultimate (Skt. paramārtha) truth.[14] For the Mahāsaṃghika branch of Buddhism, the final and ultimate meaning of the Buddha's teachings was "beyond words", and words were merely the conventional exposition of the Dharma.[15] A doctrine ascribed to the Mahāsāṃghikas is, "The power of the tathāgatas is unlimited, and the life of the buddhas is unlimited."[16] According to Guang Xing, two main aspects of the Buddha can be seen in Mahāsāṃghika teachings: the true Buddha who is omniscient and omnipotent, and the manifested forms through which he liberates sentient beings through skillful means.[17] For the Mahāsaṃghikas, the historical Gautama Buddha was one of these transformation bodies (Skt. nirmāṇakāya), while the essential real Buddha is equated with the Dharmakāya.[18]