This hadn't happened at the time of the writing. It is a command to accomplish - not a statement of a present reality. Can it happen? Depends on your definition of "unity" and "like mindedness."
John
When the day of Pentecost had fully come, they were all with one accord in one place. (Acts 2:1) It does happen.
Terry
Been to a church lately whose members are in full agreement with each other?
John
