The Search for Christian Credibility: Explorations in Contemporary Belief, is a theological work that examines how Christian faith can remain relevant, reasonable, and credible in the modern world. Porteous attempts to reinterpret basic Christian beliefs so that they can be understood and accepted by modern people without losing the essence of the faith. He invites readers to engage in a deep exploration of their own beliefs, encouraging an honest and critical approach rather than simply accepting doctrine without understanding (implicit faith). The book focuses on bridging the gap between traditional Christian dogma and the contemporary mindset (in the 1970s) that is increasingly secular, scientific, and critical and is often considered a relevant work for those grappling with doubt and seeking a deeper understanding of faith in a changing world.