There is no heresy or no philosophy which is so abhorrent to my church as a human being.

The line is a bitterly ironic indictment of an institution that, in Joyce’s view, treats ordinary human nature—bodily life, desire, doubt, individual conscience—as more threatening than abstract doctrinal error. By pairing “heresy” and “philosophy” (intellectual deviations) with “a human being” (lived reality), the speaker suggests that the church’s deepest antagonism is not toward ideas but toward the messy, autonomous person who will not be reduced to dogma. The phrasing also implies a conflict between humane sympathy and institutional purity: what should be the church’s central concern (the human) becomes what it most rejects.