On Kant’s view it can never follow from the fact that God commands us to do such-and-such that we ought to do such-and-such. In order for us to reach… - Alasdair MacIntyre

In The Triumph of the Therapeutic (1966) and also in To My Fellow Teachers (1975) Philip Rieff has documented with devastating insight a number of the ways in which truth has been displaced as a value and replaced by psychological effectiveness. The idioms of therapy have invaded all too successfully such spheres as those of education and of religion.

The manager treats ends as given, as outside his scope; his concern is with technique, with effectiveness … The therapist also treats ends as given, as outside his scope; his concern also is with technique, with effectiveness …Neither manager nor therapist, in their roles as manager and therapist, do or are able to engage in moral debate. They … purport to restrict themselves to the realms in which rational agreement in possible—that is, … to the realm of fact, the realm of means, the realm of measurable effectiveness.

Consider what kind of authority [can be ascribed to] any principle which it open to us to choose to regard as authoritative or not. I may choose for example to observe a regimen of asceticism and fasting … for reasons of health … What authority such principles possess derives from the reasons for my choice. Insofar as they are good reasons, the principles have corresponding authority; insofar as they are not, the principles are to that same extent deprived of authority. It would follow that a principle for the choice of which no reasons could be given would be a principle devoid of authority. I might indeed adopt such a principle from whim or caprice or from some arbitrary purpose … but if I then chose to abandon the principle whenever it suited me, I would be entirely free to do so.