（1） Adamantine wisdom， or diamond-like wisdom. The wisdom of the Buddha that is more sharp and more hard than anything that in comes into contact with. ［二障义HPC 1.801b］
（2） Vajrabodhi （671-741）. Indian monk， translator and ritual master acknowledged as one of the eight patriarchs of the doctrine 傅授八祖 in Shingon lineages. Born into the Bra^hman!a caste， he joined Na^landa monastery 那烂陀寺 at age 10. There， he is said to have studied Yoga^cara and mainstream texts such as the Madhya^ntavibha^gat!i^ka 辩分边论， later becoming preceptor to the Pallava king Narasim!havarma Ra^jasim!ha II. His esoteric studies began in 702 after meeting Nagabodhi 龙智， an expert in the vajrayoga of the Tattvasam!graha 金刚顶. Vajrabodhi received initiation and continued to be his disciple for the next seven years. while on a pilgrimage to Lan%ka 楞伽山， a mysterious vision inspired him to propagate the doctrine in China. Taking the sea route， he briefly sojourned in S/rivijaya; on the last leg of the trip， he lost the massive Sanskrit text of the Tattvasam!graha 金刚顶经 during a storm which destroyed much of the accompanying fleeT He arrived in Canton in 720 and proceeded to Loyang 洛阳. There he began performing rituals， initiating disciples and translating esoteric texts. In 723， he wrote down the first chapter of the Tattvasam!graha from memory， the 'Abridged， Recitable Vajra Summit Yoga' 金刚顶瑜伽中 略出念诵经 （T 766）. The emperor Xuanzong 玄宗 lent his support to this proselytising and was later initiated into the esoteric doctrine by Vajrabodhi. From 723 onwards Vajrabodhi resided at the Zisheng temple 资圣寺， translating and composing a substantial number of esoteric texts， most of which were completed between 731 and 736. He passed away shortly before a planned return to India in 741. His most prominent disciple was Amoghavajra 不空金刚， who continued his work as author， imperial patron and propagator of the esoteric doctrine.