To me the word 'church' in the intro paragraph simply means all believers. So, it fits Eph 1:13-14 fine. Is there a place in these beginning sections you see as wrong? --
"Election is first and foremost centered in Christ: "He chose us in him" (Ephesians 1:4a).
[6] Christ himself is the elect of God.
[7] Regarding Christ, God states, "Here is my servant whom I have chosen" (Matthew 12:18; cf. Isaiah 42:1, 6).
[8] God audibly declared to Christ's disciples, "This is My Son, My Chosen One; listen to Him!" (Luke 9:35)
[9] The Gospel writer John says, "I have seen and I testify that this is God’s Chosen One" (John 1:34, Today's New International Version).
[10] The apostle Peter refers to Christ as "the Living Stone . . . chosen by God and precious to Him" (1 Peter 2:4; cf. v. 6).
[11] Therefore, Christ, as the elect of God, is the foundation of our election.
[12] Through union with Christ believers become members of the elect (Ephesians 1:4, 6-7, 9-10, 12-13).
[13] No one is among the elect unless they are in a living faith union with Christ.
[14]
Election is primarily corporate
"New Testament theologian Ben Witherington remarks that apart from the word election (
eklektos) occasionally being used to apply to the king in the Old Testament, election in the Old Testament is predominantly applied corporately to a people, not to individuals. The Hebrew word for "elect" (
bahir) is normally used in the plural, and thus refers collectively of Israel. While there are times in Scripture where God chooses individuals for a specific historical task or purpose (e.g. Cyrus in Isaiah 45:1), these are passages that have nothing to do with God deciding who will be saved, thus, they are of no relevance to this topic. The corporate concept of election in the Old Testament is the context which one must view the references to election in the New Testament.
[15]
"Professor William Klein concluded that the New Testament writers "address salvific election in primarily, if not exclusively, corporate terms. In other words, God has chosen an elect body to save."
[16] The elect are identified corporately as: "the body of Christ" (Ephesians 4:12; cf. 1:22-23; 2:16; 3:6; 5:23, 30), "members of God's household" (Ephesians 2:19),
[17] "a chosen race, a royal priesthood, a holy nation, a people for his own possession" (1 Peter 2:9; cf. 2:10).
[18] Thus, election is primarily corporate and only embraces individuals (secondarily) who identify and associate themselves with the body of Christ, the church—God's new covenant community.
[19]
"New Testament scholar Brian Abasciano says that the Bible's teaching regarding "corporate election unto salvation is even more nuanced than simply saying that the group is elected primarily and the individual secondarily."
[20]
"More precisely, it refers to the election of a group as a consequence of the choice of an individual who represents the group, the corporate head and representative. That is, the group is elected as a consequence of its identification with this corporate representative. The same may be said of individuals. They are chosen as a consequence of their identification with the people, and more fundamentally, with the individual corporate head. Thus,
'God chose the people of Israel in Abraham, Isaac, and Jacob/Israel (Deuteronomy 4:37; 7:6-8). That is, by choosing Jacob/Israel, the corporate/covenant representative, God also chose his descendants as his covenant people. . . . The covenant representative on the one hand and the people/nation of Israel on the other hand are the focus of the divine covenantal election, and individuals are elect only as members of the elect people. Moreover, in principle, foreign individuals who were not originally members of the elect people could join the chosen people and become part of the elect, demonstrating again that the locus of election was the covenant community and that individuals found their election through membership in the elect people.'
"This notion of election is rooted in the Old Testament concept of corporate solidarity or representation, which views the individual as representing the community and identified with it and vice versa.
[21]
....(continues at site)
Corporate election - Wikipedia
Notice how in that last quoted paragraph, this fits perfectly how we are to "love one another" as the central command to us from Christ. We are not isolated individuals, but instead we are together in a profound way:
"Love one another as I have loved you."