Sermon of Saint Porphyrios about Orthodox Christian Faith

Porphyrios (Bairaktaris) the Kapsokalivite

Elder Porphyrios

St Porphyrios (Bairaktaris) the Kapsokalyvite (1906-1991) was an 

Athonite hieromonk known for his gifts of spiritual discernment. 

He was officially recognized as a saint by the Ecumenical Patriarchate 

of Constantinople in 2013. His feast day is December 2. (from orthodoxwiki)