Islam and Christianity, the world's two largest Divine religions, have many beliefs in common, such as God's absolute existence, His eternal existence, His creation of the universe from nothing, and His control of all matter through His infinite might. Muslims and Christians oppose the same intellectual errors; struggle against atheism, racism, fascism, and moral degeneration; and use very similar methods to communicate the message of God's existence. Their common aim is to help all people know God so that they can build a world full of justice, one in which they can live in peace and tolerance. They act out of fear, respect, and love for God; follow the path of His messengers, and abide by His revelation.

There is also great harmony in terms of moral values. A human model that thinks only of its own interests, is without love, ruthless, selfish, self-interested and lacking in honesty is the exact opposite of the religious moral values espoused by Muslims and Christians alike. Christians also long for a world governed by love, honesty, compassion, devotion, justice, humility, and fraternity, and endeavor to bring such a world about. They also strive against the behavior forbidden by our Lord, such as prostitution, homosexuality, drug abuse, violence, and exploitation.

Both Christians and Muslims harbor a deep love of and respect for Prophet Jesus (pbuh), God's chosen messenger who was introduced to us in the Qur'an and made superior to the worlds: He [Jesus] is, "of high esteem in this world and the Hereafter, and one of those brought near" (Surah Al 'Imran: 45). He is a most valuable servant, one honored by God with various miracles and superior moral values.

This book concentrates on the false belief in the trinity, which does not form part of true Christianity (defined as the message revealed to Prophet Jesus [pbuh]) and which only emerged long after he had been raised to God's presence. We shall examine, in the light of both Christian sources and the Qur'an, the monotheistic belief on which true Christianity is based, and analyze how belief in the trinity, based on the concept of the son of God (God is surely beyond that!), came into being.

However, before doing so, we wish to declare that we consider that both our Lord and Prophet Jesus (pbuh) are free of all of the expressions we shall be using to describe this belief in the trinity. In addition, throughout the book, several changes have been made to Biblical passages: the word Father has been replaced by God-Lord, and Son by Prophet-messenger. Wherever the name Jesus (pbuh), the Prophet of God, appears, the word "Prophet" has been appended as a mark of respect.

Another important matter that needs to be emphasized is that Muslims, who believe in all of the prophets and books sent by God, respect the beliefs and values of both Christians and Jews. The Qur'an considers Judaism's Torah and the Psalms as well as Christianity's New Testament to be divine books, and regards Jews and Christians as People of the Book. The Qur'an describes Muslims as "those who believe in what has been sent down to you and what was sent down before you."(Surat al-Baqara: 4)

The phrase "what was sent down before you" is a reference to the Pages of Prophet Abraham (pbuh), the Torah of Prophet Moses (pbuh), the Book of Psalms of Prophet David (pbuh), and the Gospels of Prophet Jesus (pbuh). God's revelation to Prophet Abraham (pbuh) no longer exists. The other texts have come down to us, but only in corrupted forms, for they contain statements and interpretations that are far removed from God's true religion. Nonetheless, sections compatible with the Qur'an regarding faith in God and His prophets; the love, fear, and respect of God; proper moral values and the like have survived to the present day. (God knows best.) God revealed these books as guides to the humanity: "He has sent down the Book to you with truth, confirming what was there before it. And He sent down the Torah and the Gospel previously, as guidance for humanity" (Surah Al 'Imran: 3-4). In another verse, God says of the Torah:

We sent down the Torah containing guidance and light, and the Prophets who had submitted themselves gave judgment by it for the Jews – as did their scholars and their rabbis – by what they had been allowed to preserve of God's Book to which they were witnesses. (Surat Al-Ma'ida: 44)

The Qur'an also reveals that some Jewish religious figures "distort words from their proper meanings" (Surat al-Ma'ida: 41) and write the Book with their own hands and then say: 'This is from God' to sell it for a paltry price" (Surat al-Baqara: 79). In other words, they have corrupted God's revelation to Prophet Moses (pbuh). Christians, on the other hand, have fallen into a grave error: the trinity (Surat an-Nisa': 171).

In the Qur'an, God provides a great deal of important information about the theological or moral errors of some members of People of the Book. This does not mean, however, that all of them have gone astray, as the following verses state:

They are not all the same. There is a community among the People of the Book who are upright. They recite God's Signs throughout the night, and they prostrate. They believe in God and the Last Day, enjoin the right and forbid the wrong, and compete in doing good. They are among the righteous. You will not be denied the reward for any good thing you do. God knows those who guard against evil. (Surah Al 'Imran: 113-15)

Among the People of the Book are some who believe in God, what has been sent down to you and what was sent down to them, and who are humble before God. They do not sell God's Signs for a paltry price. Such people will have their reward with their Lord. And God is swift at reckoning. (Surah Al 'Imran: 199)

Exemplary Muslims live their lives according to the Qur'an, for it determines their value judgments, moral characteristics, and perspectives on life and other people. The same thing applies to their attitude toward the People of the Book, for they always approach them on a basis of tolerance, justice, and love. Thus, Muslims regard them not as the opposition, but as devoted believers in God. Anything else would be a violation of the Qur'an, since many of them have a sincere belief in God and may therefore hope for salvation. All of the reminders presented in this book have been written with that in mind and with the intention of fulfilling God's order to "command what is good and avoid what is evil." Our goal is to show the erroneous nature of belief in the trinity and to help Christians see the truth, so that they will realize this error and abandon all beliefs that are incompatible with faith in the one God.

- Christians' Errors Regarding the Trinity
- The Qur'an Rejects Belief in the Trinity
- Belief in the Trinity Emerged Centuries after Prophet Jesus (pbuh)
- Prophet Jesus (pbuh) is God's Prophet, Not His Son
- True Christianity in the New Testament
- Prophet Jesus (pbuh), the prophet of God described in the New Testament
- The authors of the Four Gospels never met Prophet Jesus (pbuh)
- Why Might the Christians Have Made This Groundless Claim?
- Christians Opposed to the Trinity from Nicaea to the Present Day
- Conculusion