No More Learning

Hildebrand was primarily
concerned to           the absurdity of this view, and he
justifies his action by three considerations--first, the general
authority of binding and loosing given by Christ to Peter, from
which no one is exempt; second, the precedents which he cites
of such excommunications of kings in the past; and third, by
a comparison of the dignity and authority of the temporal
1 Gregory VII.