St. Justinian on Faith, Works and Unity

St. Justinian the Emperor ca. 483-565

The Scriptures tell us that if faith is not made more perfect by being joined to practice, then the work, too, is dead for it is outside of faith; and it says that no one will win a trophy unless one competes according to the rules. (cf. 2 Tim. 2:5) We understand that the source of the infirmity of our common nature is human weakness, and it affects even those who are strong in mind; but to be made sound in the knowledge of the true faith, and to embrace the unity and peace of the Church we attribute to grace. (Letter to the Monks of Alexandria Against the Monophysites)