Yeah the average modern Greek doesn't know shit about wisdom 😅

I was going to mention William James but you beat me to it. He has a famous passage about beliefs, in some occasions, becoming self-fulfilling prophecies, but he argued for it in a very rational way.

I think our beliefs are directly influenced, and limited, by how much knowledge we have. Ancient Greeks couldn't believe in Darwin's theory of evolution by natural selection because it was unavailable and they would have to come up with it in order to believe it. The less knowledge you have, the more narrow your selection of possible beliefs will be. So if you want to improve and/or expand your beliefs, more knowledge is a good bet.