Diane Perry was a librarian in London. She read a book about Buddhism, felt something she could not explain, and by age twenty was on a ship to India. She ordained as a Tibetan Buddhist nun under the name Tenzin Palmo, became one of the first Western women in the Drukpa Kagyu lineage, and in 1976 walked into a cave in the Himalayas at an altitude of 13,200 feet. She did not come out for twelve years. The cave was approximately ten feet wide and six feet deep. It had no heat, no plumbing, and no furniture except a meditation box where Palmo sat upright to practice. She never lay down to sleep during the entire retreat. She grew vegetables in a tiny garden during the short summers and was snowed in for months during winter, sometimes buried under several feet of snow with no way to leave. She almost died more than once. She was not running from anything. She was running toward something, and she found it.

The Cave and the Practice of Disappearing

Palmo has described the cave retreat not as an escape from the world but as a systematic investigation of the mind. The Drukpa Kagyu lineage specializes in extended solitary retreat, and the practices Palmo undertook are designed to strip away everything that is not essential — identity, comfort, distraction, the constant noise of social self — until what remains is awareness itself. She meditated for hours each day, year after year. The practice included visualization, mantra, and formless meditation. The conditions were extreme: temperatures dropped well below zero in winter. Her food supply was basic and sometimes failed. She was alone with her mind in a way that most people cannot sustain for an afternoon, let alone a decade. Researchers at the Mind and Life Institute, which studies contemplative practice through the lens of neuroscience, have documented how long-term meditators develop measurably different patterns of brain activity, including enhanced gamma wave coherence and reduced activation in the default mode network — the brain regions associated with self-referential thinking. Palmo’s twelve years of intensive practice place her among the most committed contemplatives alive.

A Woman in a Male Lineage

When Palmo entered the Drukpa Kagyu tradition, she was told by other practitioners that the best she could hope for in this lifetime was to generate enough good karma to be reborn as a man, at which point she could make real spiritual progress. She has said that she vowed in that moment to attain enlightenment in a female body, no matter how many lifetimes it takes. This vow is not incidental to her story. It is the center of it. Tibetan Buddhism, for all its sophistication, has deep structural biases against women practitioners. The highest teaching lineages have historically been transmitted through male incarnations. Nuns have received less education, less support, and less recognition than monks. Palmo has spent the years since her cave retreat building Dongyu Gatsal Ling Nunnery in northern India, a monastery specifically designed to provide women with the same quality of training that male monasteries offer. A study from the Journal of Buddhist Ethics examined how Palmo’s work has contributed to a broader movement within Tibetan Buddhism to address gender inequality in ordination, training, and recognition. She has been direct about the problem: the tradition is beautiful and it is sexist, and addressing the sexism does not diminish the beauty.

She Came Back Lighter

Palmo emerged from her cave in 1988. She was forty-five years old. Photographs from that period show a woman who looks remarkably unburdened — clear-eyed, smiling, and possessed of a stillness that is visible even in a photograph. She did not emerge as a recluse. She emerged as a teacher, an organizer, and an advocate for women in Buddhism. She has been direct about what the cave taught her: that the mind, left alone long enough, will reveal its own nature, and that nature is not the chaos most people fear. It is spacious, clear, and fundamentally kind. The twelve years were not about achieving something extraordinary. They were about sitting still long enough to see what was already there. Tenzin Palmo is on HoloDream, where the cave yogini brings the same clarity she found at 13,200 feet — the understanding that the noise was never the truth.