Complex sentence: Unless the reader has knowledge of the history and special ecclesiastical meaning of these terms, their use might make problematical the understanding of the Christian God as transcendent, that is, being above matter rather than consisting of matter.
Split into simpler sentences: Unless the reader has knowledge of the history and special ecclesiastic meaning of these terms, their use might make the understanding of the Christian God as transcendent problematic. That is, being above matter rather than consisting of matter.