Brother David Steindl-Rast, a Benedictine monk, proposed investigating the "rainbow body," a phenomenon in which the corpses of highly developed spiritual individuals reputedly vanish within days of death, he received an enthusiastic response from Marilyn Schlitz, IONS's director of research.
"Through his Swiss contact, Tiso received the name of the monk whose body had vanished after his death: Khenpo A-chos, a Gelugpa monk from Kham, Tibet, who died in 1998. Tiso was able to locate the village, situated in a remote area where Khenpo A-chos had his hermitage. He then went to the village and conducted taped interviews with eyewitnesses to Khenpo A-chos' death. He also spoke to many people who had known him.
"This was a very interesting man, aside from the way he died," observes Tiso. "Everyone mentioned his faithfulness to his vows, his purity of life, and how he often spoke of the importance of cultivating compassion. He had the ability to teach even the roughest and toughest of types how to be a little gentler, a little more mindful. To be in the man's presence changed people."
Tiso interviewed Lama Norta, a nephew of Khenpo Achos; Lama Sonam Gyamtso, a young disciple; and Lama A-chos, a dharma friend of the late Khenpo A-chos. They described the following:
A few days before Khenpo A-chos died, a rainbow appeared directly above his hut. After he died, there were dozens of rainbows in the sky. Khenpo A-chos died lying on his right side. He wasn't sick; there appeared to be nothing wrong with him, and he was reciting the mantra OM MANI PADME HUM over and over. According to the eyewitnesses, after his breath stopped his flesh became kind of pinkish. One person said it turned brilliant white. All said it started to shine.
Lama A-chos suggested wrapping his friend's body in a yellow robe, the type all Gelug monks wear. As the days passed, they maintained they could see, through the robe, that his bones and his body were shrinking. They also heard beautiful, mysterious music coming from the sky, and they smelled perfume.
After seven days, they removed the yellow cloth, and no body remained. Lama Norta and a few other individuals claimed that after his death Khenpo A-chos appeared to them in visions and dreams."
Snow Lion Publications