The letter of 1 John contains a unique structure:
12 I write to you, little children, Because your sins are forgiven you for His name’s sake. 13 I write to you, fathers, Because you have known Him who is from the beginning. I write to you, young men, Because you have overcome the wicked one. I write to you, little children, Because you have known the Father. 14 I have written to you, fathers, Because you have known Him who is from the beginning. I have written to you, young men, Because you are strong, and the word of God abides in you, And you have overcome the wicked one. (1 John 2:12-14 NKJV)
In studying this, I noticed similarities to the form used to address messages to the churches in Revelation. Those were written on a single scroll so each church would hear their individual message as well as the messages to the other churches.
The letter employs the same concept of different messages to different groups embedded within a larger message written on a single scroll. Like Revelation, when the letter is read, each group would hear their individual message as well as the message to the other groups.
While Revelation addresses 7 different churches the letter addresses only 4 different groups, little children (τεκνία), fathers, young men, and little children (παιδία). However, unlike Revelation where each group is addressed in the same tense, the letter addresses each group more than once using a different tense or verb. When the recipient-verb combinations are considered, the letter takes on the same form as Revelation where seven different messages follow the introduction:
Also, if the letter was written by John in Ephesus, as tradition holds, then the letter would very likely be taken to other churches and read there. In this case the seven churches in Revelation would receive the same message having the seven-fold messages to the different groups at each location.
Is this evidence that the author of the letter was familiar with Revelation and patterned their letter using the concept of the letters addressed to the seven chruches in Asia?