What is the difference between the Old Testament and the New Testament, and is everything that Jesus (peace be upon him) said present in the New Testament, and what is the relationship of the Old Testament to modern-day Christians?

The Holy Bible, according to Christians, is divided into two sections: "The Old Testament," which they claim was written before Jesus (peace be upon him) and deals with the prophets of the Children of Israel, commandments, and rulings; and "The New Testament," which they claim complements the Old Testament and deals with the life and teachings of Jesus.

Muslims believe that the Torah and the Gospel have had their words and meanings distorted, and that they are historical books containing both truth and error. Christian scholars and researchers have confirmed that the entire Bible is not divine revelation, and that its authors are not infallible.

The Old Testament contains 39 books, including the five books of Moses (the Torah). The New Testament contains 27 books, including the four Gospels.

Christians acknowledge both the Old and New Testaments, believing that the Old Testament prepares the way for the New, and the New fulfills the Old.

In conclusion, all these books are not divine revelation; rather, they were written by fallible humans, a fact acknowledged by many researchers and scholars.