Here is what Dr. Charles Ryrie has to say about the book of Ephesians. I do not think it could be stated any better:
I have to say that Ephesians is one of my favorite books in the Bible. Because it says so much about what Christ has done for the believer it seems to lift the reader right into heaven. Everytime I read it I feel as if I am on the top of a mountain surveying the grandeur of my salvation spread out in these pages.