It is typical to hear divine grace defined as "God's undeserved favor," but this does not capture the idea communicated here in Eph 2 or in other places in Paul. As this whole passage shows, God's grace, which is emphasized here by putting it first in the colon* (v. 8a), is actually God's favor granted to those who deserve his wrath (v. 3). It is not just undeserved, as if the people whom God befriends were neutral. It is act of immense favor bestowed on those who lie under God's just condemnation as transgressors and sinners. Hence, a better quick definition is: "God's favor despite human demerit."Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 159–160.
Humans contribute nothing of their own to this salvation, since even believing (which the elect are indeed enabled to do) is a divine gift (cf. Rom 3:24–25). The key to this in the context of Eph 2:8 is what Paul had been driving home so forcefully up until now: Before God's gracious intervention believers were hopelessly dead, with their wills imprisoned by nature (φύσει, physei) in acts that led only to transgression and sin (2:1–5a, 12).
Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 161.
The fallen condition of all humankind in Adam is not the result of mere social conditioning but is such "by nature" (φύσει, physei)Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 152.
The main theme of Ephesians is easy to summarize with the phrase unity in the inaugurated new creation. Paul starts out teaching at some length on the church's unity as it is rooted in God's counsel and then in his redemptive accomplishment in the incarnate Son sealed to believers in the Holy Spirit. We see throughout Ephesians the rich, biblical teaching of a full and free salvation accomplished by the triune God and received by faith alone. But biblical faith is a living faith, which necessarily manifests its presence through loveEphesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 35
grace should be understood here and elsewhere in Paul as God's favor despite the demerits of its undeserving recipients. God forgives and imputes righteousness to those who had earlier rejected his rule as their Creator and treacherously fought against him.Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 155
Union gathers up faith union with Christ, mutual indwelling, trinitarian, and nuptial notions. Participation conveys partaking the events of Christ's narrative. Identification refers to believers' location in the realm of Christ and their allegiance to his lordship. Incorporation encapsulates the corporate dimensions of membership in Christ's body.Paul and Union with Christ
"Believers partake in these central Christ-events, so what is true of Christ in his resurrection and ascension is true also of those who believe in him.Paul and Union with Christ
f there is one theological theme to which Ephesians contributes more than any other Pauline letter, it would be his theology of union with Christ. While it is prevalent in his other letters, especially Colossians, the theme of union of Christ is deeply woven into the fabric of Ephesians. It is central to every other major theme in the letter, such as salvation, Jew and gentile reconciliation, the church, walking in the light, and spiritual warfare. Indeed, it could be argued that union with Christ is the single most essential theological ingredient for the argument of Ephesians. 2 Corinthians 13:11Pillar Commentary
though the practice of magic was illegal in the Roman Empire, and was regarded socially deviant, it nevertheless flourished in Ephesus. As such, Ephesus has been described as a "metropolis for magic," with a reputation in the ancient world for its widespread magical practicesPillar Commentary
Ephesus was the "mother city" (metropolis) for Western Asia Minor (western Turkey today) in several respects. It was the third-largest city in the Roman Empire at the time, and it was a major political, economic, social, and religious center. Home to one of the seven wonders of the ancient world—the temple of Artemis—Ephesus attracted a steady stream of visitors for the purposes of worship and commerce. It was a desired destination, bustling and glamorous.Pillar Commentary
Paul may have felt that some of the content sent to the Colossians would be relevant to other churches in the region too, so he reused and expanded it to create a general letter. The impersonal nature of "Ephesians" is therefore by design so that it would be equally appropriate for churches in general rather than just one specific church.Pillar Commentary
Ephesians is rightly regarded as one of the most significant letters of human history.
As grandiose as that may sound, adulation for the letter to the Ephesians can hardly be overstated. It is, in its own way, majestic, profound, exhilarating, and—if its message is taken seriously—nothing short of earth-shattering. Its scope is cosmic, addressing the whole of creation—including physical and spiritual realms—and eternal, addressing the mission of God before the foundation of the world through to its ultimate fulfillment in the age to come.Pillar Commentary
Writing in antiquity was a particularly arduous business. It was done while seated on the ground with the tablet or papyrus suspended on one's garment between crossed legs. The reed pen had to be sharpened just so and the ink made by hand. It is no wonder that secretaries (γραμματείς, grammateis) with specialized knowledge of the mechanics of writing were usually employed in drafting one's writingsEphesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 4
There are actually very few pseudepigraphical (forged) epistles from early Christianity (cf. comments on 6:21–24), but recent research has shown that there is reason to believe that the early church opposed this practice and would have been ready to reject Ephesians if it were suspicious
Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 3.
Anyone writing on Ephesians today must deal with the issue of the denial of Pauline authorship by a significant number of scholars. Skepticism that Paul wrote this epistle was first raised by a few lone voices in the seventeenth century, but became more widespread in the mid-nineteenth century after F. C. Baur proposed that Ephesians originated in the second century. Before the critical period, there had never been any question about Pauline authorship or the canonical identity of this epistle, including its acceptance in the early church among even the earliest apostolic fathers.Ephesians, Evangelical Exegetical Commentary (Bellingham, WA: Lexham Press, 2015), 1.