Distinctions are to be note, as seen below, from among ‘The Pre and Post Acts Period’ Epistles of Paul. This below, from H.W. Fry (1848-1938), is significant to serous Bible students in noting the dispensational changes that occurred with the end of The Acts Period and the subsequent pure Gentile age of grace that exist unto this day. – Arthur J. Licursi

"A very clear dispensational distinction exists between the revelations contained in Paul’s earlier epistles, viz., Romans, Corinthians, Galatians and Thessalonians, and his later epistles, viz., Ephesians, Philippians, Colossians, Timothy, Philemon, and Titus. To illustrate the striking difference between the teaching of the earlier and the later epistles, it has been calculated that the word “Jew” is mentioned 25 times in the earlier epistles, and only once in the later. Israel is mentioned 14 times in the earlier and twice in the later, while the word “Israelite” is mentioned 3 times, Abraham 19 times and tongues 22 times in the earlier epistles, and none of them is even mentioned in the later.

Moreover, during the earlier period, the apostles, Paul included, did much in the way of healing, but during the later period Paul had to leave Trophimus at Miletum, sick. If Pentecostal powers were still at his disposal, why need he have had this infirmity?

These facts are readily explained when we remember that the earlier epistles were contemporary with the events related in the Book of Acts, while the Jews still had the opportunity to repent of their sin in the rejection and crucifixion of their King, and that of accepting the teaching of the apostles, Paul included, founded on the offer of pardon conveyed to them through Peter in Acts 3:19-21. This offer was open to them for over thirty years, and it did not come to a conclusion until Paul in Acts 28:25-28 pronounced the final rejection of the nation by God, because they had persistently rejected these gracious offers of pardon."

H.W. Fry (1848-1938)
'Things to Come'  (1910)