Meaning comes from within. If you're looking for outside sources, you've already lost. If you've achieved enough material success that you no longer have to worry about working to survive, excellent! Be grateful, for you have something 99.999% of the world will never have. Use the free time you have achieved to think about things that matter to you. Not what you 'think' should matter, not what other people say matters, but what actually matters to you. If you haven't done this before, (and it sounds like you haven't), don't be surprised when it turns out to be a genuinely difficult question. That's ok! Take your time, roll it around in your mind. Don't try and go 100% all-in on things. That only works when you have a concrete goal already defined. You need to let your default network roam around for a bit.