Abstract:Confucianism and Christianity have regarded the loyalty to ruler and filial piety for parents and the belief in God respectively as their ultimate principles of rightness. Having fallen into some similar in-depth paradoxes, therefore, they have always conflicted with each other so that they cannot make constructive dialogue between them. Only based on the ultimate principle of Critical Humanism, that is, on the universalistic idea “harm no one and love fellow humans”, could they really seek great common ground while reserving minor differences and eventually realize the ideal of “harmony in difference”.