Walls are Crumbling, John Österreicher, New York: Devin-Adair, 1953, 168 (Cf. Max Scheler, Der Formalismus in der Ethik und die materiale Wertethik, p. 24.).
Approximately 20 years [after his ordination], Augustine wrote a book called the Retractations, in which he critically reviewed all the works he had thus far written, adding corrections wherever he had in the meantime learned something new.
With regard to the ideal of perfection in his homilies on the Sermon on the Mount, he noted: "In the meantime, I have understood that one alone is truly perfect and that the words of the Sermon on the Mount are totally fulfilled in one alone: Jesus Christ himself.
"The whole Church, on the other hand -- all of us, including the Apostles -- must pray every day: forgive us our trespasses as we forgive those who trespass against us" (cf. Retract. I 19, 1-3).
Augustine had learned a further degree of humility -- not only the humility of integrating his great thought into the humble faith of the Church, not only the humility of translating his great knowledge into the simplicity of announcement, but also the humility of recognizing that he himself and the entire pilgrim Church needed and continually need the merciful goodness of a God who forgives every day.
And we, he added, liken ourselves to Christ, the only Perfect One, to the greatest possible extent when we become, like him, people of mercy.