Constructive Pessimism
I first saw this movie in 1964, when i was 21.
I immediately started reading everything by Kazantzakis i could find in English, starting with "Zorba" and ending with K's sequel in verse to Homer's Odyssey.
My life has been much influenced by ideas i took from Kazantzakis in general and especially as embodied in the character Zorba; Zorba's attitude toward war (essentially "been there, done that, it's stupid") and the statement "life is trouble" (but it's worth it, i would add) stand out.
Constructive pessimism is what i call the acceptance of the possibility of failure coupled with the drive to try anyway.