Genesis to John – The Old Covenant God made with Israel.
Except the parts pertaining to Noah and Adam & Eve – they weren’t Jews. Adam & Eve weren’t Jews, nor were they privy to the Abrahamic Covenant which was future, and not yet revealed, Noah likewise – Noah wasn’t a circumcised, law-keeping Jew.
Romans to Philemon – “But Now”. Times of the Gentiles. You are currently living in this time, it’s called the Dispensation of Grace, the revelation of the mystery revealed to the Apostle Paul (the Apostle to the Gentiles) by the ASCENDED Christ, which means – you don’t follow Christ according to His earthly ministry today, because Christ’s earthly ministry was to Israel. He came to offer them their Kingdom.
What did He say? But He answered and said, “I was sent ONLY to the lost sheep of the house of Israel” – Matthew 15:24
“These twelve Jesus sent forth, and commanded them, saying,” Go NOT INTO THE WAY OF THE GENTILES, and into any city of the Samaritans enter ye not:” – Matthew 10:5.
The Samaritans were Gentiles.
Hebrews to Revelation – The New Covenant that supersedes the Old Covenant that God made with? Israel. Future.
The Bible is progressive revelation : times past, but now and times to come.
God remains the same, but the way He deals with people changes in different dispensations – He didn’t deal with Noah in the same way He dealt with Adam & Eve. Noah was commanded to build an Ark, Adam & Eve were told not to eat from the tree of the knowledge of good and evil, nor did He deal with Abraham the same way He dealt with Adam & Eve and Noah. Abraham was commanded to leave Ur and God made a covenant with him and his descendants (Jews).
God isn’t dealing with us the same way He dealt with the Jews. First off, He didn’t make a covenant with Gentiles, today He commands us to believe the Gospel of Christ (1 Corinthians 15:1-4). Faith without works – absolutely no self-reliance. Justified by faith alone.
Paul’s epistles mention absolutely NOTHING about adhering to the Jewish New Covenant, but they mention everything regarding the BODY OF CHRIST which term by the way cannot be found in any of the Hebrew epistles.
We can see dispensational changes in the Bible by way of diets :
Adam & Eve were commanded to eat only fruit and herbs, they were herbivores.
Noah on the other hand could eat anything after the flood, including the flesh of animals.
Abraham and the Jews were commanded to only eat clean animals, i.e., kosher food.
Today we are free to eat what we like.
We are not under the Levitical or Mosaic Law today, nor are we under the Abrahamic Covenant – old or new.
We are living under the Dispensation of the grace of God,
If ye have heard of the dispensation of the grace of God which is given me to you-ward: – The Apostle Paul, Ephesians 3:2.
So where does the book of Acts fit into all of this?
It is the (transitional) bridge between law and grace. From prophecy to mystery where the doctrine of the 12 Apostles is waning, while the doctrine of the Apostle Paul is gaining ground.
Anyone who reads the King James Bible for themselves will acknowledge these truths.