A book of apologetics with classical foundations but aimed at contemporaries, it corrects misunderstandings and offers thoughtful responses to common objections about the Catholic faith.
The book explains the “how and why” of the Catholic faith, drawing on Scripture, his own struggles and those of other converts, as well as everyday life. Hahn shows that reason and revelation, nature and the supernatural, are not opposed to each other; rather they offer complementary evidence that God exists.
For this he gives natural reasons, biblical reasons, and real (kingly) reasons. Hahn leads readers to see that God created the universe with a purpose and a form, a form that can be found in the Book of Genesis and that is there when we view the natural world through a microscope or our touch. At the heart of the book is Hahn's examination of the ten “keys of the kingdom,” the characteristics of the Church clearly evident in Scripture. As the creation story reveals, the world is a house that has a Father, a palace where the king is truly present. God created the cosmos to be a kingdom, and that kingdom is the universal Church, fully revealed by Jesus Christ.