Some empirical feelings, such as sympathy, are indispensable parts of certain moral virtues.

Sometimes when a philosopher's views are widely rejected by the world, the fault is not with the philosopher but with the world.

We can establish empirical criteria for free actions, and investigate human actions on the presupposition we are free.

Karl Marx left it to others to find the way beyond capitalism to a higher form of society. He saw his role as giving them as accurate a theory as he could of how capitalism works, which would also show them the reasons why it needs to be abolished and replaced by a freer and more human form of society.

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.

Kant attempted to work out a view of religion and religious belief according to which existing religions could be brought into harmony with modernity, science and reason.

We cannot predict the effects of our actions, especially our collective actions over generations or centuries, to use instrumental reasoning toward these big final ends to tell us what we ought to do.