Our father among the saints Nicholas Cabasilas (born 1319/23 in Thessaloniki and died sometime after 1391) was a well known theological writer and mystic of the Orthodox Church. He was born in Thessaloniki and, as a young man, was involved in politics. Little is known of his later life, however, he is remembered for his two treatises, Life in Christ and The Exposition of the Divine Liturgy. These volumes are generally regarded as classics of Eastern sacramental theology.