 While the centrality of ‘person’ stands in most natural affinity with the name of Kant, the idea undergoes a number of critical developments in the various strands of post-Kantian idealism. On the one hand, Kant had relied on personality in distinguishing rational being from mere things, by reference to the former’s capacity for self-government or autonomy. Further, Kant had insisted that persons have “worth” or “value” and that this serves as a critical characteristic separating them from mere things (which may be said to have only a “price”). On the other, the scientific approach, when applied directly to human beings, appear to have rendered the notion of personality incomprehensible and superfluous. (Indeed, Lotze would probably not be at all surprised by the threat posed to personal identity resulting from reflection on the quantum theory!). Also, if Christianity is re-described as an ethical religion—stressing the essential aspects of interior life and, henceforth, abandoning all claims to metaphysical or cosmological significance—then it cannot stand simply as a bulwark against the materialist onslaught on inessential aspects of our subjectivity.