I've not seen Daniele talk about Joseph Campbell before. I like reading his stories of mythology and one of his major recriminations of modern societies were that modern religion concretized myths as reality (i.e. we have a religion about Jesus instead of one about what he stood for) and that humans stop seeing myths as guides for life.
While this isn't a myth, Daniele once posted a link to the below video. Whenever at work or life I feel like I'm getting kicked around or wasting my time or need to find that inner strength to keep me going I watch this video. Poor? Pathetic? Maybe, but I never give up after seeing it. The moment this man ever gave up would be the moment hell freezes over… It isn't a myth per se, it is better, it is reality..