Even in the New Testament, there are many things that are quite similar between Christianity and Islam. In fact, many of the sayings of the Prophet Muhammad are extremely close to what was preached by the apostle and Christian saint Paul in the New Testament. The emphasis on the importance of faith and the urging for one to try to live a righteous life by doing no harm to others is quite evident in both cases. Both Christianity and Islam also place a marked importance on the concept of love, especially in God's love for humanity. This concept of a benevolent God that loves his creation is a central part of both faiths. Islam and Christianity also share the belief in the afterlife and in eternal salvation, the belief in a kind of Paradise that is real and awaits those that have faith and live righteous lives.
A major point of discussion between both religions is what is needed to gain access to this paradise in the afterlife. Much of this discussion is moot, however, because both religions say the same things, although with a different emphasis. In this discussion is where many of the misunderstandings about both religions come about. Many followers of both religions fail to realize that both religions preach that both faith and good deeds are essential in achieving salvation. However, in Christianity there is quite a lot more weight on the faith than in good deeds. This is due to the historical circumstances, since Christianity was meant as a new way for the Jewish people to live their lives, away from pointless rule-following that tended to be the norm among many, the Pharisees being a typical example. In Islam, the emphasis is on doing good deeds, also due to historical circumstances. The religion was initially aimed at an Arab population that was still living in relative lawlessness in a tribal society. Rules were needed to create a functional and united Arab community. It is important to note that neither religion preaches that it is enough to have one without the other, faith in God or living a good life by doing good deeds. Both religions state clearly that having faith in God and living a good and righteous life are both needed when following the righteous path. Understanding this would go a long way towards clearing the more common misconceptions Muslims have about Christianity and Christians about Islam.