Maximus the Confessor ( ) also known as Maximus the Theologian and Maximus of Constantinople ( c. 580 -- 13 August 662 ) was a Christian monk , theologian , and scholar .
Saint Maximus the Confessor ( also known as Maximus the Theologian and Maximus of Constantinople ) ( born 580 -- 13 August , 662 ) was a Christian monk , theologian , and scholar .