The New Testament was compiled in 325 A.D. by the Council of Nicea. The Emperor Constantine convened the council to settle any disputes that occurred. Sunday as the Christian Sabbath, JESUS' birthday and the day of Easter, and etc. By this time some writings have been lost and destroyed, also some writings may have been omitted and some changes may have been made in putting together the New Testament. The gospels relates to the life and death of JESUS, and also His Sermon on the Mount, His parables, about who shall be able to enter the kingdom of God are written in the gospels. JESUS also spoke of the King to come to bring together those that will inherit kingdom of God on earth, and gave warning of false prophets and false Christs that would decieve the very elect, if it were possible.
Thirteen of twenty seven letters or writings were written as they were Saul/St.Paul words, some were written before the gospels. It seems that many of Paul's letters were written about 50 AD and the gospels were written about 68-100 AD. Saul/St.Paul forceful preaching had the ability of framing, influencing, and promoting his own ideology before the other New Testament books were written. By 200 A.D., Christianity had already gone off the rails from JESUS's original GOSPEL OF LOVE, and was well on its way to becoming precisely the kind of hierarchal and VIOLENCE-BASED system, that JESUS had rebelled against. By the third century Saul/St.Paul's teaching's gave birth to an entirely new religion, to the satifaction of The Emperor Constantine, which came to have less and less to do with its supposed founder, the JESUS that is in oneness with his FATHER in heaven.
Peace be with you, Paul