Note 5 at Eph. 4:3: The word "endeavoring" means to make a "conscientious or concerted effort toward a given end; an earnest attempt; to exert oneself; to make it one's duty" (American Heritage Dict.). The unity of the Spirit has not been kept in the body of Christ and, in fact, there is very little unity among believers today. This has taken thousands of years to occur and it probably won't be fixed over night. We are to strive towards unity but not be overwhelmed at the problem.

Note 6 at Eph. 4:3: Notice that this scripture doesn't tell us to produce unity. It says, "keep the unity." All Christians have already been joined to each other through the body of Christ and God the Father sees us all as His children. All divisions among Christians are made by man, not God. For a brief period of time, the church enjoyed unity here on earth. But regardless of what strife and division has occurred, all believers still are one in Christ and will live in perfect oneness throughout all eternity. We are now one in the Spirit. We just need to experience that unity here on earth. "Thy kingdom come. Thy will be done in earth as it is in heaven" (Mt. 6:10).

In the next few verses, Paul is going to give seven arguments that prove that we truly are one in Christ Jesus.