Paul wraps up this section by claiming there is "one God of all, who is over all and through all and in all". It's a big, expansive statement to wrap up this section where Paul gives a list of reasons for why Christians should experience unity.
Some denominations choose to baptize infants while other denominations wait and baptize followers of Jesus as adults once they have the ability to make that decision for themselves. But Paul says there is one baptism. So who's right? Should we baptize infants or adults? And how can we find unity in the midst of a disagree like this?
Paul tells us that their is one faith, so does that mean there is only one right way to understand Christianity? Is only one denomination "right" and all the others wrong? If so, how do we know who is right and who is wrong? Or is there a better way to understand Paul's statement that there is "one faith"?
Paul said that there is one Lord, Jesus Christ, which was a huge political statement in a world ruled by Romans Caesars and who forced everyone to claim that "Caesar is Lord". To deny lordship to Caesar and instead claim that Jesus was Lord was the type of thing that cold easily get you killed. So what does that mean for us today? What does it mean to claim that Jesus is Lord?