In the book Written on the Heart: The Case for Natural Law, J. Budziszewski addresses the question of government through nature and its limits. This book informs the reader how natural law plays a role in answering political and ethical questions. This is done by examining the four major philosophers and their works. In the following pages we will focus on his review of Thomas Aquinas and how his Catholic faith influenced his understanding of natural law as he understood the works of Aristotle. Budziszewski's explanation of Aquinas begins in Unit II and is "probably the chapter most sought after by those interested in Aquinas' (Rodriguez) view of natural law. To understand the differences between Aquinas and Aristotle one must first have a brief understanding of Aristotle's view on natural law. The book Written on the Heart: The Case of Natural Law, Aristotle is considered a pagan since he does not teach the Greeks that God or religion controls the world and its people. .Aristotle believes that nature had a purpose and was guided by natural laws that human reason could discover. This provided Aristotle with the ability to explain the world and the humans within it Aristotle's political philosophy with the Christian faith, resulting in the understanding that a just ruler or government must work for the "common good" of All. Thomas Aquinas thought that one should only believe what is evident or can be deduced from evident propositions. (Parmann)Aquinas added his own observations on Aristotle, which included reasoned plans based on the certainties revealed by God. Thomas Aquinas spent much of his life writing summaries of Catholic doctrine that also attempted to put on paper a period in which the kings claimed that no one but God could hold them accountable. (Parmann) In conclusion it could be said that Aquinas, despite being a great admirer of Aristotle, differed greatly from him when aspects of the Christian faith were introduced into the mix. Budziszewski alludes to this very early in his description of Aquinas's type of philosophy by stating that Thomas received his perspective from the pagans, and often time obscured the Christian view to accommodate it. The only thing that is clear from reading Written on the Heart: The Case for Natural Law, by J. Budziszewski, is that it could be used as a fundamental reference point for trying to understand the different perspectives of philosophy while realizing many cases that you can have a belief rooted in faith and what philosophical understanding. Overall one could say that this book was a great seminal work.