There is a tradition of "modernist" theology arising out of post-Kantian thought - Fichte was the real father of it, but Schleiermacher and others also developed it - which might have more promise if it had greater influence on popular religion.

Capitalism now seems more likely a swamp, a bog, a quicksand in which humanity is presently flailing about, unable to extricate itself, perhaps doomed to perish within a few generations from the long term effects of the technology which seemed to Marx its greatest gift to humanity.

We can't coherently deny, or even decline to affirm, that we are free.

As with many metaphysical and religious questions, Kant thinks they lie beyond our power to answer them. If you can't stand the frustration involved in accepting this, and insist on finding some more stable position which affords you peace of mind and intellectual self-complacency, then you will find Kant's position "problematic" in the sense that you can't bring yourself to accept it. You may try to kid yourself into accepting either some naturalistic deflationary answer to the problem or some dishonest supernaturalist answer.

In my acquaintance with John Rawls, I found him to be a simple and honest man, who just by chance also happened to be the greatest moral philosopher of the twentieth century. I would like to think that I could emulate at least his modesty - his refusal to exaggerate his perception of himself and his place in the larger scheme of things - even if my work never compares with his in its importance.

Kant's system of duties constitutes a Doctrine of Virtue because the duties also indicate what kinds of attitudes, dispositions and feelings are morally virtuous or vicious.

Being aware of truths about what is good or right or about what we ought to do is not the same as deciding what to do. Nor can the former truths be derived from decisions about what to do, or about procedures for making such decisions, unless these procedures themselves rest in some way on the apprehension of truths about what we ought to do.