Last night, after the Bible study, I was asked a question about why it is taking so long to read through one letter of six chapters. It is a good question. :)
My answer had many parts. The first is that we aren't just studying the one book. For example, last night, we referenced chapters in Genesis, II Timothy and Galatians, in addition to the passage in Ephesians 5. In fact, we are looking at the whole Bible from the perspective of the letter to the Ephesians.
In order to understand the letter, we need to know the mindset of the Apostle who wrote it. Since he was Jewish, his background understanding is that of the Old Testament. So we need to read some of the concepts of the Old Testament to understand what he is saying.
The second part of my answer is that many of the Bible study members are hoping to improve their English language skills, as well as their Bible knowledge. Every week we examine several English words that occur in the text we are studying. This practice improves our English vocabulary, as well as our Bible knowledge.