What Marley captures here isn't the tired platitude that money doesn't guarantee happiness—it's something sharper: that life itself, in its essential vitality and meaning, operates in a currency money cannot purchase. You can own possessions, secure comfort, even buy years of leisure, yet remain spiritually bankrupt. Consider the person who retires at forty with a fortune but discovers their relationships have withered to nothing, or that their sense of purpose evaporated the moment work stopped—they've learned what Marley understood: that the texture of a lived life depends on things that exist entirely outside commerce, whether that's love, growth, spiritual practice, or simply the daily work of becoming someone worth being.