Islam is the religion that follows the teachings of Allah revealed through the Holy Qur'an under the directions of the prophet Muhammad. It bases its historicity on the promise of God to Abraham through Ishmael to the Arabic peoples that a great prophet would come to lead the world to righteousness. Christianity follows the teachings of God revealed through the Holy Bible under the final revelation of God's will through Jesus Christ. Its historicity is based on the promise of God to Abraham through Isaac that salvation would come through the chosen people as God would work through them and reveal the way of righteousness that would lead to salvation.
We can see that both religions are based on a similar premise, but see the fulfillment of that promise in very different ways. Actually, by comparing the two books, the Qur'an and the Bible, we can see quite a difference in the two faiths. If we could see that the Bible was full of errors, then we could see the purity of the Qur'an because it claims the Bible is corrupted. (Sara 2.80; 5.14,16.) If we could see the faults of the Qur'an, then we could understand more fully the claim of Jesus and the Bible that it is the true way of God. (John 14.6; 2 Timothy 3.16-17.) To introduce you to this comparative study, we would like for you to consider some of the following items very carefully. We realize we are giving only one side of this issue, although we are trying to be as fair a possible. Please consider carefully what we have to say and do not formulate hasty opinions, whether you be Christian or Muslim.
The Qur'an has a definite dependence on the Bible. Without the Bible, the Qur'an would not be understandable. Whenever one studies the Qur'an, it does not take long to see just how this book would be totally incomplete without the Bible. Lacking in the Qur'an are so many details and events from stories found only in the Bible. Events from the lives of men like Noah, Moses, Abraham, Joseph, the people of Israel as well as from many other Biblical stories are completely left out of the Qur'an, yet these same stories are referred to over and over in the Qur'an. It is very common to see Muslim writers referring to Biblical passages like Genesis 16; Deuteronomy 18; Isaiah 42; Daniel 2; Malachi 3; Matthew 5, 10, 21; John 16; Luke 1; Acts 3; Hebrews 6 and Revelation 19. These references are made for many reasons, but very often simply to provide necessary information that cannot be found in the Qur'an. Our point is simply this: If the Bible is so corrupted, why do the Muslims need to refer to it for so many of their teachings? Even more importantly, if the Bible is so corrupt and is not the word of God, then why is the Qur'an so dependent on the Bible for so much information? If the Qur'an is God's book, do you not think that it would give all this information rather than having to be so dependent on something made by man?
Very often you will hear Muslim teachers claim that the Bible was true or does contain some truth, but that the New Testament apostles like Paul, Peter and John invented most of the Bible and developed the religion called Christianity. They will say that Jesus was a prophet, but not the Son of God (only son of His kind, that is God Himself in the flesh, John 5.18) and that the early Christians wrote the New Testament without any guidance from God. Yet, these same Muslim teachers will quote from the Bible and the words of Jesus which they try to use to teach their Islamic doctrines and then turn around and say the New Testament documents are false. On the one hand, they want us to believe the Bible is full of error. On the other hand, they want to quote from the Bible when they think it supports their teachings. How can this be? To say the Bible is full of error and then to quote from it they must know which parts are pure and which parts are corrupted. Yet, how can they know this? The Qur'an does not guide them in this. They cannot have it both ways. They must either produce for us the "pure" Bible or admit they are not consistent. To be truthful, one must be consistent.
You might find it interesting to note these passages from the Qur'an and how they differ with what the Bible says: Sura 11.42-44 and Genesis 6.10; 7.7; 10.1; Sura 12.11-21, 36-57 and Genesis 37.12-28; 40.1-41.57; Sura 26.55-60 and Exodus 1.9-14; Sura 3.41 and Luke 1.18-20,24, 57-64. Please do compare these passages and you will see the Qur'an contradicts what the Bible says. When the Qur'an tells us the Bible is from God and then contradicts the Bible, we must doubt the Qur'an. We cannot believe both the Qur'an and the Bible.
The Bible never mentions the Qur'an, but rather says that it (the Bible) is the complete word of God. (2 Timothy 3.16-17; 2 Peter 1.3; John 14.6.) If God had planned to reveal further knowledge through Muhammad, do you not think the Bible would have told us in a way that we could easily see? Still, the Muslim teacher will say the Bible did predict Muhammad, but then also say that the Bible is so corrupted it cannot be trusted. How can this be? To our Muslim friends we would say that when you doubt the Bible and teach that it is corrupt, you are rendering your own faith vain because without the Bible the Qur'an is meaningless. Remember that both books cannot be true because both books claim to be the final word of God. Since the Qur'an would be rendered useless without the Bible, how can we say the Qur'an alone is true? If the Bible is true, there is no need for the Qur'an and we should reject it. We call upon our Muslim friends to seriously consider their position as we Christians should study very carefully and reach only for the truth.
Is there an answer? Yes, truth will never change. Our aim should be the pursuit of truth, for as Jesus said, "You shall know the truth and the truth will make you free." (John 8.32.) Please study this issue well, and let God's truth be your guide.
"Surely, man is in a state of loss, except those who believe and do good works, and exhort one another to accept the truth." (Sura 103.3-4)