Runia on the Hellenization of Christianity

From David T. Runia's Philo and the Church Fathers:

"[I]n retrospect the process of [the Hellenization of Christianity] was inevitable. By this I do not wish to say that it could not have gone differently. This is a matter of pure speculation. What I want to emphasize is that Christianity could not have become the Christianity that we know, if it had not accepted the challenge posed by Greek philosophy with its trust in a world-view based on rational thought. ... The process of Hellenization took place, but it did not penetrate to Christianity's heart. This heart is to be located in the Gospel, and within it, at the cross of Jesus Christ. This nucleus stays out of the reach of both Philonism and Platonism."