Read the whole of the Paul's argument here in Ephesians, and especially chapter 4.
He is saying there is a unity of faith and there are those who are given gifts to edify the body of Christ, so that we may "grow up". And that we should grow up, putting away our lusts, and walk after righteousness.
(We have the words of those apostles, and can read them for edification.)
This growth is also talked about in 1 Corinthians, also with reference to when we are babies in Christ we have divisions.
1 And I, brethren, could not speak unto you as unto spiritual, but as
unto carnal, even as unto babes in Christ. 2 I have fed you with milk,
and not with meat: for hitherto ye were not able to bear it, neither
yet now are ye able. 3 For ye are yet carnal: for whereas there is
among you envying, and strife, and divisions, are ye not carnal, and
walk as men?
1 Corinthians 3:1-3
When we eat bread, it is for strength and the bread of Christ is the word of God. (See also John 1:1-14, John 6:32-40, Mark 14:22) So read your bible so you may grow in your understanding of what "faith" means.
Faith doesn't just mean being freed from being a slave to sin, but being a servant of righteousness.
Being then made free from sin, ye became the servants of righteousness. Romans 6:18
Try not to get stuck on words, or individual verses, but read whole chapters, whole books, and indeed the whole bible. It is your daily bread. Beware of leaven.