Pantheism is the idea that God and the world are identical--that the creator, sustainer, destroyer, and transformer of all things is the universe itself. From a monotheistic perspective, this notion is irremediably heretical since it suggests divinity might be material, mutable, and multiple. Since the excommunication of Baruch Spinoza, Western thought has therefore demonized what it calls pantheism, accusing it of incoherence, absurdity, and--with...