John reports Jesus gave a new command which would identify followers of Jesus Christ:
A new commandment I give unto you, That ye love (ἀγαπᾶτε) one another; as I have loved (ἠγάπησα) you, that ye also love (ἀγαπᾶτε) one another. By this shall all men know that ye are my disciples, if ye have love (ἀγάπην) one to another. (John 13:34-35 KJV)
Christ followers are to be identified by their agape/agapao love. While the use of agape and agapao is found throughout the New Testament, the works with the highest number of uses are 1 John, John, and Ephesians:
In addition to the largest number of uses, when the use is compared to the total number of words within a work, John's letters reflect a similar pattern: a high frequency of use equal to or greater than Ephesians.
In addition, among all New Testament works, agapao and agape are only found in the same verse in John's Gospel (15:9, 17:26), John's letter (2:15, 4:7, 4:8, 4:10, 4:12), and Paul's letter to the Ephesians (2:4, 5:2).
Ephesus is the location where Paul had his greatest success:
This continued for two years, so that all the residents of Asia heard the word of the Lord, both Jews and Greeks. (Acts 19:10 ESV)
As the location of Paul's final work in Asia, Ephesus would logically reflect his most developed teaching on love and the importance of love is key in the letter to the Ephesians in Revelation:
But I have this against you, that you have abandoned the love (ἀγάπην) you had at first. (Revelation 2:4 ESV)
Does this New Testament use of agapao (ἀγαπάω) and agape (ἀγάπη) demonstrate John wrote from Ephesus?