"It may be relevant here to recall gratefully a fraternal correction I was kindly offered by the Archimandrite Ambrosius of the Greek Orthodox Church. After listening to a lecture I delivered at Oxford University some years ago, he gently chided me (in private, not in public) for not perceiving the difference between the brand of Hellenism affecting Western theology that had absorbed the philosophical thought of ancient Greece, and the Hellenism of Eastern Orthodox theology which had assimilated the spiritual praxis of their non-Christian ancestors. Mulling over this critical observation of his, I came to understand why our scholastic tradition has not given importance to what Greek Orthodox spirituality has named nepsis (vigilance), which is its own technical term for mindfulness."