I'd suspect that most people who have no religion have a substitute of some kind, it provides a lot and gets little credit, it possible to live without it but I believe it would be such a different life. Have you ever read Jung's more spiritual or religious reflections? Like Modern Man in Search of His Soul? Eric Bettelheim (spelling) has write a brilliant book about the mistranslation of Freud which explains how those two could have had an intellectual partnership, I'd often wondered since one is religious and the other the archetypical atheist.
Although its altogether possible to have beliefs, including religious ones, and not practice them.