Glassman first encountered Zen when he was assigned Huston Smith's "The Religions of Man" for an English class in 1958. From there, he continued reading including books by Alan Watts, Christmas Humphreys, and D.T. Suzuki. In the early 1960s, Glassman began meditating and soon after sought a local Zen teacher. He found Taizan Maezumi in Los Angeles, California and Glassman became one of the original founding members of the Zen Center of Los Angeles. He received Dharma transmission in 1976 from Maezumi and then inka in 1995 shortly before Maezumi's death.