He was the spiritual father, or teacher, of Symeon the New Theologian.
Forty chapters in the book Patmiacus 427, all pertaining to the spiritual life, are credited to him as "Symeon the Devout" (Eulabes in Greek).
His own writings show him as taking a practical approach to the spiritual life, while other writings from that time described him as a Holy Fool.
[1] Symeon the New Theologian revered him as a saint, which drew the rebuke of church officials who felt the younger Symeon was honoring someone who they considered to be less than saintly.
This Byzantine biographical article is a stub.