Though the Buddha taught a variety of concepts, such as the Four Noble Truths for the monastic voice-hearers, Dependent Origination for the privately awakened ones, and the Six Perfection for those who wished to become buddhas (the vehicle of the bodhisattvas), they are all different aspects of the One Vehicle of Buddhahood. When the Buddha taught the One Vehicle in the Lotus Sutra, he finally made it clear that all along his intention had been to lead all beings to Buddhahood.