Today the Byzantine mystic, writer, and monastic leader Symeon the New Theologian (ca. 949 to 1022 ce) is considered a saint by the Orthodox Church and revered as one of its most influential spiritual thinkers. But in his own time a cloud of controversy surrounded him and the suspicion of heresy tainted his reputation long afterward.

The Life was written more than thirty years after Symeon's death by his disciple and apologist the theologian Niketas Stethatos, who also edited all of Symeon's spiritual writings. An unusually valuable piece of Byzantine hagiography, it not only...