The well annotated book Concepts of God in the Old and New Testaments questions the wisdom of established Christian Churches in accepting the Old Testament as an essential part of their worship. It contrasts the Jewish God of Justice with the God of Mercy and Love which Jesus preached. It encourages the reader to believe in his or her ability, through the inner presence of the Holy Spirit, to aid in building up the Kingdom of God on earth. It de-emphasizes the appeal of eternal life as a reward for following the teachings of Jesus. The section on the New Testament contains a critical appraisal of the Epistles of Paul.