"I had never before been in Greece and I found what I saw exceedingly interesting. In one respect, however, I was surprised. After being impressed by the great solid achievements which everybody admires, I found myself in a little church belonging to the days when Greece was part of the Byzantine Empire. To my astonishment, I felt more at home in this little church than I did in the Parthenon or in any of the other Greek buildings of Pagan times. I realised then that the Christian outlook had a firmer hold upon me than I had imagined. The hold was not upon my beliefs, but upon my feelings. It seemed to me that where the Greeks differed from the modern world it was chiefy through the absence of a sense of sin, and I realised with some astonishment that I, myself, am powerfully affected by this sense in my feelings though not in my beliefs."
January 1, 1970
https://en.wikiquote.org/wiki/The_Autobiography_of_Bertrand_Russell