This book is a brief summary in which I wish to clarify the origin of Christianity and its present-day reality. It is to lead the Christians to know the roots of their beliefs (to believe in One God and unifying Him in worship). In this summary, I have made an effort to cite the Qur'anic verses which mention the story of Jesus Christ and his mother, and to give the evidence from the current texts of the Torah and the Gospel to illustrate to the Christian readers The True Message of Jesus Christ using their own sources. This book helps all freethinkers, open-minded and the seekers of the truth to know that what was sent by the Creator (Allah) to all nations with all messengers throughout the history was one unique message i.e. Pure Monotheism. Prophet Jesus was also one of those pious messengers who endeavored to guide their people to the truth, but many people followed their desires and thus went far from the prophetic teachings.