Commonitory for the Antiquity and Universality of the Catholic Faith

What we ought to learn from these Examples.

[47.] It behooves us, then, to give heed to these instances from Church History, so many and so great, and others of the same description, and to understand distinctly, in accordance with the rule laid down in Deuteronomy, that if at any time a Doctor in the Church have erred from the faith, Divine Providence permits it in order to make trial of us, whether or not we love God with all our heart and with all our mind.