This paper compares the ethics of Xunzi and Kant, aiming to show that their thoughts on morality were similar. First we consider how Xunzi emphasizes the roles of both the conscious exertion(僞) of mind and natural emotion(性) in moral change. Second, we reflect on how Kant considers the functioning of the emotions in the practice of moral law as well as the reason's autonomy that establish moral law. Therefore, Xunzi and Kant lay stress on both the inborn human's passive 'emotion' and active 'autonomy' performing conscious exertion that is independent from the aspect of emotion. They insist that the genuine morality is impossible with only one of the two aspects and that genuine morality can be achieved when the two elements cooperate.