He was from a noble family in Constantinople, and became the private secretary of the Emperor Heraclius and his grandson Constans. But when the Monothelite heresy (that Christ possesses one divine will, rather than a divine and a human will) took hold in the Imperial court, the Saint could not bear to be surrounded by this error and left the court for the Monastery at Chrysopolis, where in time he became the abbot. From the monastery he continued to speak and write in defense of Orthodox belief. The Emperor Constans ordered him either to accept Monothelite belief or to cease speaking against it, but St Maximos would do neither. For this, his tongue was torn out, his right hand was cut off, and he was sent into exile, where he reposed in 662. He is also commemorated on January 21; see that day for a slightly fuller account.