Starting with the Bible. The New Testament in It’s current form was not finalized until 382AD. 350 years after the death of Jesus. The proposed cannon was 73 books which the Church still acknowledges today. The Catholic Church gave the world the Bible. The Bible does not exist apart from the Church and the Church does not exist apart from the Bible.
Matthew 16:18-19 “And I tell you , you are Peter, and on this rock I will build my church, and the gates of hell shall not prevail against it. I will entrust to you the keys of the kingdom of heaven, and whatever you bind on earth shall be bound in heaven and whatever you loose on earth shall be loosed in heaven.”
This passage clearly shows that Jesus is certainly establishing His Church. He gives this Church the ability to ratify issues not only on earth but also in heaven. What Church is Jesus talking about here?
“You must follow the bishop as Jesus Christ follows the Father, and the presbytery as you would Apostles. Reverence the deacons as you would the command of God. Let no one do anything of concern to the Church without the bishop. Let that be considered a valid Eucharist which is celebrated by the bishop, or by one whom he appoints. Wherever the bishop appears, let the people be there, just as wherever Jesus Christ is, there is the Catholic Church.” St. Ignatius of Antioch, Letter to the Smyrnaeans 8:1-2, 107AD
“We call this food the Eucharist; and no one else is permitted to partake of it, except one who believes our teaching to be true and who has been washed in the washing which is for the remission of sins and for regeneration; and is thereby living as Christ enjoined. For not as common bread nor common drink do we receive these; but since Jesus Christ our Savior was made incarnate by the word of God and had both flesh and blood for our salvation, so too, as we have been taught, the food which has been made into the Eucharist by the Eucharistic prayer set down by Him, and by the change of which our blood and flesh is nurtured, is both the flesh and the blood of that incarnated Jesus.” - St. Justin Martyr First Apology 66, 151 AD
These two passages by Early Church Fathers, we clearly see there is a hierarchy of bishop, his presbytery of priests, and deacons. This church is also given the authority to partake in a valid Eucharist, passed on from the original apostles and disciples of Jesus time.
2Peter3:16 describing Paul’s Letters “In them are some things hard to understand, which the ignorant or unstable distort to their own destruction, just as they do the other scriptures.”
Authority of the Church is very important in studying and deciphering scripture which was originally meant to be used in the readings of the mass