Which came first: the Gospels or Paul's Letters?

In his overview of Chapter 12, Dummelow says:

“The doctrinal part of the Epistle being finished, (Joyce – Phew!) St. Paul now turns to practical exhortation.  God’s mercy, shown in the gospel set forth in the previous chapters, calls for the sacrifice of ourselves to do His will (vv.1, 2) by the humble and devoted use of God’s spiritual gifts (vv. 3-8), and in love (vv. 9-21).”

Did Paul have the Gospels to refer to?  Had he read the Sermon on the Mount?  Chapter 12 reminds me of that Sermon.  Did wonderful Paul come up with similar ideas through his own inspired communion with the Father-Mother?  After all, he knew that he had same Mind which was also in Christ Jesus (Phil. 2:5). One is reminded of one of our Daily Duty prayers: “You have simply to preserve a scientific, positive sense of unity with your divine source, and daily demonstrate this” (Pulpit and Press by Mary Baker Eddy p. 4:9-11).

My curiosity is satisfied with this list from A Guide to Bible Study (Sorry, I don't have the reference for this text just now - Ed)

James - 50 A.D.

First Thessalonians - 52-53.

Second Thessalonians - 52-53.

Galatians - 55.

First Corinthians - 57.

Second Corinthians - 57.

Romans - 57-58.

Philippians - 62-63.

Colossians - 62-63.

Philemon - 62-63.

Ephesians - 62-63.

Luke - 63.

Acts - 64.

First Timothy - 65.

Titus - 65.

Second Timothy - 66.

Mark - 66.

Matthew - 67.

Hebrews - 67.

First Peter - 67-68.

Second Peter - 68.

Jude - 68.

Apocalypse - 68.

John - c. 85.

Epistles of John - 90-95.

 

So, Paul actually beat Matthew as far as Romans is concerned.  I Cor. 13 was written at a similar time.  How full of love Paul was at that time!

Joyce Voysey