19.

 What was the Monothelite heresy?

            The Monothelite heresy was a new form of Monophysitism. While it correctly maintained that Christ has two natures, it erroneously reasoned that since He is a single Person, He has but one will. This heresy, like Monophysitism, impaired the fullness of Christ's manhood since manhood without a human will would be incomplete. Monothelitism was condemned by the Sixth Ecumenical Council, which replied that since Christ has two natures, He must also have two wills — one human and one divine.