What does "poa" actually mean?

Bright on Buddhism Episode 29 - What does "poa" actually mean? Why is it important? How has the understanding of this term changed over time? Resources :Bayer, Achim. “From Transference to Transformation: Levels of Understanding in Tibetan ‘Ars Moriendi.’” The Eastern Buddhist 44, no. 1 (2013): 77–96. http://www.jstor.org/stable/44362527.; Halkias, Georgios T. “Tantric Transfer in Sukhāvatī.” In Luminous Bliss: A Religious History of Pure Land Literature in Tibet, 139–63. University of Hawai’i Press, 2013. http://www.jstor.org/stable/j.ctt6wqg95.13.; Halkias, Georgios T. “Visions of the Pure Land from the Mind Treasury of Namchö Migyur Dorje.” In Pure Lands in Asian Texts and Contexts: An Anthology, edited by Georgios T. Halkias and Richard K. Payne, 139–54. University of Hawai’i Press, 2019. https://doi.org/10.2307/j.ctv7r42sn.10.; Halkias, Georgios T. Luminous Bliss: A Religious History of Pure Land Literature in Tibet. University of Hawai’i Press, 2013. http://www.jstor.org/stable/j.ctt6wqg95.; Inoue, Nobutaka. “Modern New Religions’ Responses to Globalization in a Post-Modern World.” In Globalizing Asian Religions: Management and Marketing, edited by Wendy Smith, Hirochika Nakamaki, Louella Matsunaga, and Tamasin Ramsay, 357–68. Amsterdam University Press, 2019. https://doi.org/10.2307/j.ctvdmwxmr.20.; Kevin Trainor: Buddhism: An Illustrated Guide; Donald Lopez: Norton Anthology of World Religions: Buddhism; Chan Master Sheng Yen: Orthodox Chinese Buddhisml; Nagarjuna: Verses of The Middle Way (The Madhyamakarika); Conze, Edward, trans. The Perfection of Wisdom in Eight Thousand Lines and Its Verse Summary. Bolinas, CA: Four Seasons Foundation, 1973.; The Bodhisattva Vow: A Practical Guide to Helping Others, page 1, Tharpa Publications (2nd. ed., 1995) ISBN 978-0-948006-50-0; Flanagan, Owen (2011-08-12). The Bodhisattva's Brain: Buddhism Naturalized. MIT Press. p. 107. ISBN 978-0-262-29723-3.; Williams, Paul, Mahayana Buddhism: The Doctrinal Foundations, Routledge, 2008, pp. 195–196. Do you have a question about Buddhism that you'd like us to discuss? Let us know by tweeting to us @BrightBuddhism, emailing us at [email protected], or joining us on our discord server, Hidden Sangha https://discord.gg/tEwcVpu! Credits: Nick Bright: Script, Cover Art, Music, Voice of Hearer, Co-Host Proven Paradox: Editing, mixing and mastering, social media, Voice of Hermit, Co-Host