Using this approach, Clark labored to expose the contradictions of many worldviews that were in vogue in his day and to defend the Christian worldview by proving its consistency over and against those who attacked it. His unflagging use of logic sometimes led him to what most Reformed theologians consider rather unorthodox ideas on such topics as the problem of evil—topics which are most often treated by theologians as paradoxes or apparent contradictions not resolvable by human logic. But Clark famously rejected the idea that Scripture teaches paradoxes and notion of "apparent contradiction", asking "apparent to whom?". He described an alleged biblical paradox as nothing more than "a charley-horse between the ears that can be eliminated by rational massage."