This short write-up starts to explain the meaning of the word "one." This term could mean a sole, singular item (act, idea, thing—a 2nd or 3rd other excluded). It can also mean an instance where one item or object is named in one place in the Bible, but it does not exclude another item or object mentioned elsewhere. This is called the "inclusive one." It allows for a 2nd or 3rd item found in another section of the Bible.
Acts 16:30-31 says, "Believe on the Lord Jesus Christ." Do we limit salvation based solely on mental, historical recognition of Christ's existence to obtain salvation? No, it does not exclude repentance and immersion in water found in Acts 2:38.
Ephesians 4:5 says, "One Lord, one faith, one immersion." One Lord? Does this teach that there is one person who exclusively enjoys the title "Lord"? Yes or no?
In Matthew 11:25 and Luke 10:21, Christ addresses the Father, "O Father, Lord of heaven and earth..." Do we discard the Lordship of the Father so that Lordship belongs only to Jesus Christ? Yes or no?
"One baptism/immersion"? Does the context mean water immersion only? Is there no immersion in fire mentioned in Matthew 3:12 and Luke 3:17? Yes or no? If we are to be consistent with the idea that "one" excludes all others, then we would have to disregard the immersion in fire. Do you want that kind of interpretation? Yes or no?
Is not two considered "one"? Can two entities, two persons, be considered "one"? Yes or no?
Deuteronomy 6:4 reads, "Hear, O Israel, the LORD our God, the LORD is one." Which of the two (Father or Son) is demoted, removed from the name Yahweh? The Father or the Son? Zechariah 14:9b reads, "On that day the LORD will be one, and His name one." Is the Father or the Son demoted? Son or Father? God has several names: I AM WHO I AM, Yahweh, Jehovah Jireh, Jehovah Tsidkenu, etc. What name will remain for our God if "one" means there is no second or third?
However, the term "one" can also mean unity or harmony of two or more people. Please check a dictionary to find out that "one" or the word "only" is not limited to a solo, singular, lonesome object, act, or person. [TO BE CONTINUED...]