Dr. Sire begins his talk by asserting that the mechanism of belief is inescapable in life. In addition, the question of why we believe what we do has been of ultimate importance for all people, at all times, and in all places. Arguing that we must learn to make the fine distinction between reasons to believe and causes of belief, Dr. Sire examines the social, psychological, genetic, and religious theories of belief by employing this distinction to each category. Finally, Dr. Sire argues that what one believes must cohere to reality, and he offers several arguments that the Christian faith is a system of belief that does just this.