1 Peter 1:3-5
Ephesians 1:4 says, “Just as He chose us in Him” This is telling us that those who would be elected for salvation before the foundation of the world were elected or selected “in Him” i.e., in Christ. The Greek helps us to understand what is going on in this verse. The Greek grammatical classification is locative of sphere, which means, “chosen out in the realm of Christ”. This means that each person selected by God for salvation was included in the realm of the saving work of the Lord Jesus. As a bird is in the realm of the air, a fish in the realm of the water, the roots of a tree in the realm of the soil, the believer is selected in the realm of Christ… “in Him”.
“In Him” is referring to the sphere of Christ’s saving work. It’s as if God draws a circle, one that encompasses the redemptive work of Christ. It is out of this realm that believers are chosen. This is why it is impossible for anyone to be saved by works—salvation is of the Lord! (Jonah 2:9) It is His work; we are chosen in Him.