A religion should not be judged by the opinions and attitudes of its biased enemies. Neither should it be judged by the behavior of some of its nominal followers because there are bad people among every religious group, and making a judgment based on those people is misleading as they may be violating their religion. A religion should rather be judged by its teachings as well as the effects of these teachings on its real followers.

Since the Bible is the basis for the teachings of Christianity, and the Qur'an is the main source of Islamic Religion and Law, this book compares Islam and Christianity according to a comparative study of the Bible and the Qur'an. This approach ensures that the comparison is based on facts and not on prejudice or misunderstanding.

It should be emphasized that when this book talks about Islam, it does not give exaggerated or insincere information to persuade the reader, but rather presents the real teachings of Islam. Everything mentioned in this book, about Islam, is supported by Verses from the Qur'an which was revealed about fourteen hundred years ago. Likewise, everything mentioned about Christianity is supported by verses from the Bible