My dear friend, Trent Sebits, raised the question about why Lutherans observe in our sanctoral calendars those with whom we are not in 100% doctrinal agreement. He pointed out that certain of the fourth century saints taught and practiced invocation of the saints, something which Lutherans regard as dangerous and not Biblical. My question back to Trent was why do the Orthodox observe:
St. Isaac the Syrian (January 28th), though he was a Nestorian.
St. Jerome (June 15th), though he taught that there was no divine distinction between bishop and presbyter.
St. Augustine (August 28) and St. Leo of Rome (Feb. 18), though both taught the filioque as Church doctrine (numerous other names could be added to that one, especially in Western Rite Orthodoxy).
St. Epiphanios of Salamis (May 12) and St. Gregory the Great (March 12), though they taught against veneration of icons
St. Ambrose of Milan (December 7th), though he taught that the words of Christ are what consecrate the Holy Eucharist.
Now, I do not at all consider the Orthodox inconsistent for celebrating feast days commemorating these great fathers of the Church, even though at the points mentioned, they disagree with the Orthodox teaching today. The fact remains that even the Orthodox do not have to agree with a father 100% of the time to regard him as a genuine father of the Church. For Lutherans it is much the same. The fathers (and mothers!) in our commemorations are those whom we rejoice in as having blessed the Church in some particular way - usually in a way that has endured. So, no. We don't agree with the fathers we commemorate 100%. As I told Trent, we don't even agree with Luther 100%. But we recognize and celebrate especially how the great fathers, when some part of the Apostolic Gospel was under attack, defended it with vigor and clarity from the Sacred Scriptures and called the Church back to that pure fountain of Israel!