Settling every Bible based question or studying every Bible based topic can hardly be resolved with a single verse every time, but there are times when a single verse is so clear and concise in what is being said, the point cannot be missed by any honest Bible student.
For example, take the question and topic of the church’s nature when it comes to its numeric state. It is quite controversial in many circles to insist that the existence of any more than one church is wrong. Controversy on Earth aside, the issue is settled in the eyes of Heaven! All one has to do is read Ephesians 4:4 where the Bible says, “There is one body and one Spirit, just as you were called in one hope of your calling;”
The fact that there is one body, which is the church (Ephesians 5:23, 30; Colossians 1:18), is no more open for debate than the one Spirit, the one hope, the one Lord, the one faith, the one baptism or the one God and Father (Ephesians 4:5-6). People may not like the way it makes us feel in light of the numerous bodies in the religious world around us, but feelings and facts aren’t always agreeable. And when it comes to being in agreement with the scriptures and the numeric value (whether literal or relational) of the church, there is only one option.