With Christianity and Confucianism as its research subjects, this book integrates them as two “paradigms” into the framework of “religious existential ethics” at the metaphysical level, viewing them as a kind of “religious existential ethics” but with “different” thoughts and models. The concept of “religious existential ethics” points to a universal and fundamental value-based existential order grounded on ** and oriented towards **. With this conceptual perspective, the book sets its foot on the development of the Christian Bible and modern theology as well as the “Four Books” of Confucianism and other ideology texts to reinterpret a series of basic but important topics: the concept of God in Christianity and the concept of destiny in Confucianism, the doctrine of original sin in Christianity and the doctrine of original goodness in Confucianism, the doctrine of salvation through others in Christianity and the doctrine of self-cultivation in Confucianism, the concept of God’s love in Christianity and the concept of benevolence in Confucianism, the hope of eternal life in Christianity and the pursuit of immortality in Confucianism.