This short book arose out of four talks given by John Macquarrie to the congregation of his parish church in Oxford in Lent 1994. They were asking questions which concern many people today - questions about science and religion, omnipotence and infinity, the God of the Old Testament, the continuity of fathe and how far one faith can be universal, Christ's humanity and the purpose of the creeds. Professor Macquarrie responded by discussing four major issues: 'Why Believe?', 'Believing in God', 'What about Jesus Christ?', 'Do We Need the Church?'