"There is much in Luther that is interesting, perceptive, and true. However, there is also much that does not speak the same language as early Christianity. And herein lies the great divide in the ecumenical dialogue. For the ecumenical dialogue to bear fruit, the very controversies that separate the churches must not be hushed up. Rather they must be brought into the open and discussed frankly, respectfully, and thoroughly."
January 1, 1970
https://en.wikiquote.org/wiki/Georges_Florovsky