Let me put forward one or two considerations in reply to these questions.
In the first place, religious progress means spiritual progress, and spirit means personality. Therefore religious progress must take place in the spiritual lives of personalities –it must show itself in their rising to a spiritually higher state and achieving a spiritually finer activity.
Now, in assuming that this individual progress is what spiritual progress means, are we after all admitting Frazer’s thesis that the higher religions are essentially and incurably anti-social? Does a shift of human interests and energy from trying to create the values aimed at in the civilizations to trying to create the values aimed at in the higher religions mean that the values for which the civilizations stand are bound to suffer? Are spiritual and social values antithetical and inimical to each other? Is it true that the fabric of civilization is undermined if the salvation of the individual soul is taken as being the supreme aim of life?
Frazer answers these questions in the affirmative. If his answer were right it would mean that human life was a tragedy without a catharsis. But I personally believe that Frazer’s answer is not right, because I think it is based on a fundamental misconception of what the nature of souls or personalities is.
Personalities are inconceivable except as agents of spiritual activity; and the only conceivable scope for spiritual activity lies in relations between spirit and spirit. It is because spirit implies spiritual relations that Christian theology has completed the Jewish doctrine of the Unity of God with the Christian doctrine of the Trinity. The doctrine of the Trinity is the theological way of expressing the revelation that God is a spirit; the doctrine of the Redemption is the theological way of expressing the revelation that God is Love.