St Gregory Palamas
Saint Gregory Palamas was a monk of Mount Athos and later Archbishop of Thessalonica, renowned as a preeminent theologian of Hesychasm. His writings, some collected in the Philokalia, delve into profound spiritual themes and the defense of Hesychast doctrine. His work is significant within Eastern Christianity, exploring the nature of divine energy and humanity's connection to it. Palamas is valued for his theological depth and emphasis on mystical experience.