St. Hilarion the Great, as he is sometimes called, was born in Palestine. After his conversion to Christianity he spent some time with St. Anthony of Egypt, another holy man drawn to solitude. Hilarion lived a life of hardship and simplicity in the desert, where he also experienced spiritual dryness that included temptations to despair. At the same time, miracles were attributed to him.
As his fame grew, a small group of disciples wanted to follow Hilarion. He began a series of journeys to find a place where he could live away from the world. He finally settled on Cyprus, where he died in 371 at about age 80.
Hilarion is celebrated as the founder of monasticism in Palestine. Much of his fame flows from the biography of him written by St. Jerome.