Righteous Nicholas Cabasilas

IMPORTANT CLARIFICATION ON CANONIZATION: the saint is indeed formally canonized — the Church of Greece approved his service and akathist on November 4, 1982, and his glorification took place in 1982–1983 (sources vary on the exact date the process was completed). CATEGORY: it is important that Nicholas Cabasilas remained a layman his entire life — he never took monastic vows — so the correct category is "righteous," not "venerable" (which is reserved for monastics). DATE CORRECTION: the previously listed contaminated date list ("December 6/May 9/July 29," belonging to St. Nicholas the Wonderworker of Myra) has been fully replaced with his own correct date.

Nicholas Cabasilas was born into an aristocratic Thessalonian family (nephew of St. Nilus of Thessalonica), educated in Constantinople in philosophy and rhetoric (1335–1340). He served as secretary and counselor to Emperor John VI Kantakouzenos and undertook diplomatic missions; despite his status as a layman, he was even considered as a possible patriarchal candidate — a highly unusual case.

He was a committed defender of Palamite (hesychast) theology against its critics, such as Nikephoros Gregoras, while remaining intellectually open to dialogue with Latinophile figures like Demetrios Kydones. His major works — "The Life in Christ" and "A Commentary on the Divine Liturgy" — are foundational texts of Byzantine mystical and liturgical theology, still widely read today.

His feast is kept on June 20/July 3.