I commented to a post on FreeGrace blog on Ephesians 1:
You wrote: "Verses 4-6 expound on how the Father is involved in the church’s salvation: He chose us."
They DO NOT. This passage is not about salvation, but about the blessings from God by our position as saints based on our being 'in Christ'. This phrase or its analogue 'in him' is the drum-beat of the first chapter, and they are all showing that our blessings revolved around our being 'in him'.
The passage is about Christ not about us. It is about us, being regenerated we are 'in Christ' for the purpose that we would be holy and blameless being in him.
Correspondingly, we are not predestined for salvation, but being saved we have a destination previously set by God for those who would be in Christ: adoption as sons!
Incidentally, if we are talking about salvation, the order of salvation is set out in 1:13, 14:
In him, you also, after listening to the message of truth, the gospel of your salvation—having also believed, you were sealed in him with the Holy Spirit of promise, 14 who is given as a pledge of our inheritance, with a view to the redemption of God’s own possession, to the praise of His glory.
See the order: Listened--Believed--Sealed (regenerated).
We could set it out thus:
"In him, you also, after
listening to the message of truth, the gospel of your salvation—having also
believed, you were
sealed in him with the Holy Spirit of promise, 14 who is given as a pledge of our inheritance,
[For?]
with a view to the redemption of God’s own possession, to the praise of His glory."