The full name of The Diamond Sutra in the original Sanskrit is Vajracchedikā-prajñāpāramitā sūtra. In Sanskrit, the word "vajra" means "sharpness, destroyer of all", which is why in English the diamond and thunderbolt are often used to describe it. "Prajñā" refers to "wisdom". Therefore, this sutra is a canon by which ignorance can be eradicated and wisdom achieved. Since The Diamond Sutra belongs to the Prajñā scriptures of Mahāyāna Buddhism, transcribing its text is also considered a means of achieving merit and practice beyond reading, reciting, and accepting its contents. Consequently, some calligraphers have participated in the writing of sutras. Four brushed examples in this exhibit by famous calligraphers include ones by Chang Chi-chih (1186-1263) of the Southern Sung, Yeh Ting and Chao Meng-fu (1254-1322) of the Yüan dynasty, and Tung Ch'i-ch'ang (1555-1636) of the Ming. Each of them, with its unique features, is treasured in its own right.