Carla Bagnoli argues that Kant’s conception of respect as a moral feeling is crucial to any constructivist theory of practical reason because it provides the only satisfactory account of how moral commands carry subjective authority—how they are experienced as binding by finite agents endowed with rationality. Without positing a moral feeling of respect, a constructivist theory can account for objective moral obligations, but it cannot explain why finite agents can take an interest in action. This account centered on the moral feeling of respect is defended in contrast to the mechanisms of the “reflective endorsement” of moral ends or actions, which has been proposed by prominent Kantian constructivists. The theory of respect as a moral feeling is an integral and eliminable element of Kantian constructivism, whose absence compromises the constructivist account of practical reason and undermines its objectivist aspirations.