In the Church of Ephesus there was great division between Jewish converts to Christianity and Gentile converts to Christianity, so Paul from a prison dungeon in Rome hears of the schism in the Church and writes this letter reminding both Jews and Gentiles what they were before Christ saved them, what they are now that they have been saved and what they need to be to one another as believers.
If there is division in your home, workplace, church, this is the message that will help you bring peace to a toxic situation.