Adolf von Harnack,
History of Dogma, Volume 1
“ The Christian Church and its doctrine were developed within the Roman world and Greek culture in opposition to the Jewish Church. This fact is just as important for the history of dogma as the other stated above, that this Church was continuously nourished on the Old Testament. Christendom was of course conscious of being in opposition to the empire and its culture, as well as to Judaism; but this from the beginning—apart from a few exceptions—was not without reservations. No man can serve two masters ”
