St. Paul adds that this death to self is possible only to him in whom another than his own natural will lives; "so then it is not I that live, but Christ that liveth in me." Comte would probably accept the sentence with the substitution of humanity for Christ. But either substitution involves the negation of the natural tendencies, whether individual or social, in their immediate natural form; and Comte himself, when he placed not only the sexual but even the maternal impulse among those that are merely "personal," virtually acknowledged that the natural or instinctive basis of the altruistic affections is not in itself moral.[39] But because he begins with a psychology which treats the egoistic and altruistic desires, and again the intellect and the heart, as distinct and independent entities, he is unable to do justice to an account of moral experience which involves that they are essentially related elements in one whole, or necessarily connected stages of its development. In the form in which it was first presented, the teaching of Christianity was undoubtedly ambiguous, as, indeed, every doctrine in its first general and abstract form must be. We cannot then call it either social or anti-social, without limitations; it is anti-social and ascetic, because of its negative relations to the previous forms of life and culture; it is social and positive in so far as in its primary doctrine of the unity of the divine and human--of divinity manifested in man and humanity made perfect through suffering--it contains the promise and the necessity of a development by which nature and spirit shall be reconciled. The progressive tendency of Christendom was based on the fact that from the earliest times the followers of Christ were placed in the dilemma, either of denying their primary doctrine of reconciliation between God and man and going back to pure Monotheism, or of advancing to the reconciliation of all those other antagonisms of spirit and nature, the world and the Church, which arose out of the circumstances of its first publication. And modern history is more than anything else the history of the long process whereby this logical necessity manifested itself in fact. The negative spirit of the Middle Age, its asceticism, its dualism, its formalism, its tendency to transform the moral opposition of natural and spiritual into an external opposition between two natural worlds, present and future, and thus to substitute "other-worldliness" for worldliness, instead of substituting unworldliness for both--all these characteristics were the natural results of the fact that the idea of Christianity, in its first abstract form, could not include, and therefore necessarily became opposed to, the forms of social life and organization with which it came into contact. But while the early Christians looked for the realization of the kingdom of Heaven in some immediate earthly future, and the Middle