Ephesians 4:9 - Ellicott's Commentary On The Whole Bible

The lower parts of the earth. — This may mean either the regions of the earth, as “lower” than heaven, or the regions beneath the earth. The reasoning of the text in itself would be satisfied by the former. For St. Paul is simply arguing that the use of the phrase “ascended” from earth to heaven implies a previous corresponding descent, which must be from heaven to earth; exactly as in John 3:13, “No man hath ascended into heaven, but He that came down from heaven.” But form and usage of the phrase itself seem to point to the other meaning, which is held by almost all ancient interpreters and most moderns. It agrees with the strong expression of “filling all things,” in Ephesians 4:10, and is possibly suggested by the leading captive of the powers of hell and death. Though, perhaps, injurious to the strictness of the antithesis, it is quite accordant with St. Paul’s manner to introduce thus a fresh idea beyond the simple idea of descent, which is sufficient for his argument: “He descended — yea, even to the realms below.” For this idea is most apposite to that frequent reference to spiritual powers of evil found in this Epistle, and it may be thought to correspond by antithesis to the “far above all heavens” of the next verse.