Zen expected to become familiar with the classics of the Zen canon". A review of the early historical documents and literature of early Zen masters clearly reveals that they were well versed in numerous Mahāyāna Buddhist sūtras, including Madhyamaka. Especially the Lotus Sutra played a large role in the development of East Asian Buddhism, including Zen. Nevertheless, Zen is often pictured as anti-intellectual. This picture of Zen emerged during the Song Dynasty (960–1297), when Chán became the dominant form of Buddhism in China, and gained great popularity among the educated and literary classes of Chinese society. The use of koans, which
Buddhism in Vietnam and a new Thiền style has "no affinity with or any foundation in traditional Vietnamese Buddhist practices" and according to Alexander Soucy (2007) his style of Zen Buddhism is not reflective of actual Vietnamese Buddhism. Thích Nhất Hạnh often recounts about his early Thiền practices in Vietnam in his Dharma talks saying that he continued and developed this practice in the West which has a distinctive Vietnamese Thiền flavor. Thích Nhất Hạnh's Buddhist teachings have started to return to a Vietnam where the Buddhist landscape is now being shaped by the combined Vietnamese and Westernized Buddhism that is focused more