The purpose of this study is to explore early Buddhist ethics in comparison with classical Confucianist ethics and to show similarities. The study suggests that the popular belief that the two ethical systems are radically different from each other needs to be reconsidered. When a focus is given to the development, transformation, and realization of the self, a similar framework is revealed in the two ethical systems. Furthermore, this study intends to reject the popular thesis: early Buddhism is only self-liberation-concerned (...) soteriology and classical Confucianism is only society-concerned thought requiring self-effacement. ;My understanding of the core virtue of self-transformation is as compassion in early Buddhism and benevolence in classical Confucianism. So this study is focused on the analysis of compassion and benevolence by examining their metaphysical grounds, their functional mechanisms, their applications, and their meta-ethical nature. ;The metaphysical groundworks of morals are explained in terms of the rebirth and kamma theory, and the theory of Mandate of Heaven. For a person to develop and achieve these core virtues, this study shows the significant role of self-restraining or self-overcoming, the principle of extension from near to far, self-oriented motivation for the core virtue, both-regarding position , and the important role of both sympathetic feeling and reason. In the domain of social interaction, compassion and benevolence appear in the area of education and politics as tools for achieving happiness for both oneself and others. In politics, the paradigmatic model is adopted: a ruler as an embodiment of the virtue rules a country by being a moral example to the people. ;The analysis of the core virtues in terms of moral objective shows the inseparability of factual knowledge from moral practice, the universal acceptability of the virtue, and the possibility of maintaining objectivity by taking both-regarding action. (shrink)