1 John was written so the elect would be able to know they are saved. Read the Bible - it clearly states that God has chosen the elect. But perhaps you’re more interested in what the men in Rome say than what the Lord God in Heaven has said.
I just read through the First Epistle of John, and I did not get the impression that he is writing about predestination. I got the impression he is teaching the basics of the faith to a group of faithful, those who had been baptized into the Body of Christ, and denouncing Gnostic teachings that said Jesus never came in flesh and other heresies.
Why would I listen to someone else’s interpretation of Scripture when I have the interpretation of the very church handed down through the ages and protected by the Holy Spirit?
You know, I don’t have to search the internet to find lies about whatever religion you have, I trust in the Holy Spirit to handle that.
As for me, I will practice my faith in Jesus through the One, Holy, Catholic and Apostolic Church founded on Jesus and protected throghout the ages by the Holy Spirit.
If you choose you may rely on your own understanding but I can sure see where ego can creep into that understanding of Scripture and hijack your understanding. I don’t despair, I know that I am willing to follow Father, Son and Holy Spirit and they will not lead me astray. I also don’t despair for those who are separated from the One, Holy, Catholic and Apostolic Church because Jesus has infinite Mercy.