Romans: The Letter That Changed the World by Tommy Nelson. The most important idea in the Bible is how a Holy God can get a sinful man into Heaven and not compromise who He is. Romans tell us just that! It sits as Master of the House before all of Paul’s writings. It is the Bible in miniature. It is the most important singular document ever penned by man and only inspiration could make it so. In our study in Romans we will look at Paul’s unfolding logic and incisive reasoning as to the divinity and holiness of the Christian gospel. When this book has been understood, reformation and new life follow shortly. Romans is set at just the perfect pace for any Christian who wants to understand the most central book in the Bible.