“Follow you heart.” There’s something about this bit of proverbial wisdom that sounds so right, so refreshing, so healing. To those who’ve shaken free of the restraints of religious moralism or experienced the bankruptcy of rationalism, the rediscovery of one’s heart is a thrilling find indeed. To uncover this precious gift from beneath a thousand layers of emotional limestone is, in a deep way, to be born again. And what a wonderful surprise to find out that perhaps the human heart is, at its core, not some monster to be destroyed, but a pearl to be reclaimed and cherished. And so we hear this anthem, this slogan—Follow your heart!—...