Casting off of body and mind.

Bernie Glassman ( 1939 - ), aka Tetsugen Bernard Glassman, is an American Zen Buddhist roshi and co-founder of the Zen Peacemakers (previously the Zen Peacemaker Order), an organization established in 1996 with his late wife Sandra Jishu Holmes. Glassman is a Dharma successor of the late Taizan Maezumi-roshi, and has to date given inka and Dharma transmission[1] to several individuals.

Glassman teaches about what his teacher, the late Taizan Maezumi[2], called the "unknowing." Unknowing is the first precept of the Zen Peacemaker Circle, and Glassman says of it, "In Zen the words source and essence are the equivalent of Unknowing, and they come up again and again. We have the absolute and the relative perspectives about life, and Unknowing is the one source of both of these." Also, Glassman has become known for his many "street retreats—excursions by Glassman and others into the streets for weeks at a time to live amongst the homeless.

[1] a custom in which a person is established as a "successor in an unbroken lineage of teachers and disciples, a spiritual 'bloodline' theoretically traced back to the Buddha himself."

[2] Hakuyū Taizan Maezumi (1931—1995) was a Japanese Zen Buddhist teacher and rōshi, and lineage holder in the Sōtō, Rinzai and Harada-Yasutani traditions of Zen. He combined the Rinzai use of koans(a story, dialogue, question, or statement, which is used in Zen-practice to provoke the "great doubt", and test a student's progress in Zen practice.) and the Sōtō emphasis on shikantaza(a Japanese term for zazen, a meditative discipline practitioners perform to calm the body and the mind, and be able to concentrate enough to experience insight into the nature of existence and thereby gain enlightenment, which was introduced by Rujing[3]) in his teachings.

[3] Tiāntóng Rújìng was a Caodong Buddhist monk. He is traditionally the originator of the terms shikantaza and shinjin-datsuraku ("casting off of body and mind").