This is the reason that Montaigne argues for a separation between public and private spheres - the subjective nature of happiness demands it. We each need space to try to achieve happiness privately, without interference from the public. Montaigne would be horrified, for example, at the proliferation of social media, where we take what we should, in his view, be private and make it public. Not only is it obscene, it doesn't serve us. We obscure our own happiness from ourselves by trying to project it and articulate it and prove it to others. These sites, he would say, flatten and falsify happiness when they ask us to affirm each other's life choices through likes.