The present essay is divided into six sections. The first section recapitulates the main points of Professor Chang Hao's celebrated work ”Consciousness of Darkness and Democratic Tradition.” In section 2, I add a supplement and offer a correction to Chang's arguments from four aspects, particularly those about orthodox Christianity's perspective on the consciousness of darkness in human nature, suggesting that Chang's understanding is far from what is shown in traditional Chinese thoughts and orthodox Christianity. In section 3, I firstly discuss three issues in regard to human nature and democracy: the idea that human nature is evil can lead to anti-democracy; the belief that human nature is evil is not what democratic system is based on; and, non-Christian thoughts had helped to shape democracy, though unintentionally. In light of these philosophical reasoning and historical reality, I clarify the relationship between the consciousness of darkness and democratic systems. In section 4, I demonstrate that there has never been the concept of democracy in traditional Chinese thoughts and Christianity. Instead, both of them have understood the dynastic transition from the perspectives of Heaven's Mandate. However, their understandings of Heaven's Mandate are obviously different from each other in the fundamental sense. Section 5 starts by explaining why we adopt democracy, pointing out that democracy is no more than an expediency for securing liberty for the time being. I further delve into Christianity's viewpoint on liberty, which has been widely saluted. The last section reflects on the democracy-related issues such as whether the Christian church should adopt democracy, the actual degree of the practice of democracy in the Christian church, and whether it should be practiced uncompromisingly.