To page eight, and falling.
One doesn’t get a choice about falling. It’s obligatory, in that way. One has to fall. But you can feel that you are falling while stationary. Saying “I felt I was falling” could be true whether one is falling or not.
One can feel one is falling, but not be falling. So could one feel obligated, but not be obligated?
There is no difficulty about the idea that we feel we have to behave morally, and given the psychological conditions of the learning of moral behavior it is natural that we should have such feelings. What we cannot do is quote them in support of the doctrine of the categorical imperative.
The wedge between the categorical imperative and the obligation is driven a bit deeper.