Jesus came & established a new covenant between God & all humanity.
Jesus fulfilled & extended the original covenantal relationship between God & the human race, through His work of salvation.
This new covenantal relationship promises life forever with God in heaven, if humans accept Jesus’ teachings, follow Him & live according to the values that He taught & lived by.
The books of the New Testament talk about Jesus, His life, teachings, sufferings, death & His resurrection, & about the growth & spread of His Church, which continues to this day, to carry on His work & mission to spread the Good news to the whole world.
The Catholic Church accepted the Jewish OT books that was accepted by the Apostles at the beginning of the Church i.e. Hebrew Scripture (39) and Greek Septuagint (46), which had existed in pre-Christian era.
In fact, Septuagint was popular among Jews living outside of Palestine who were more at home with Gk language.
It was their Gk bible & for this reason it was adopted by the Christians when they began to evangelize in Gk speaking world around the Mediterranean region.
The Septuagint became the bible of the first generation of Christians ( NT was still non-existent).
The collection of books of NT as sacred/ canonical, began with the preservation of the writings of the Apostles who were eye-witnesses of the life & teaching of Jesus, and upon whom the Holy Spirit had descended on Pentecost day, the day the Church was born.
By about year 150 the NT had been quoted as Scripture.
CCC 76. In keeping with the Lord’s command, the Gospel was handed on in two ways:
- orally ‘by the apostles who handed on, by the spoken word of their preaching, by the example they gave, by the institutions they established, what they themselves had received – whether from the lips of Christ, from his way of life and his works, or whether they had learned it at the prompting of the Holy Spirit, ‘
So the Catholic Church believes that there is only one divine source of revelation – God alone – from which flow two streams of insight – Sacred Scripture & Sacred Tradition, composing one living “deposit of Christian faith”.