Eph 1:11-12, 11 In Him also we have obtained an inheritance, being predestined according to the purpose of Him who works all things according to the counsel of His will, 12 …
Inheritance is reserved for heirs who have a birthright (any right or privilege entitled by birth). In God’s kingdom, an heir must be a son. The problem is that our nature as slaves disqualified us from becoming sons until God drew us and changed our nature to be sons by adoption in Christ Jesus.
The picture of inheritance is clearly seen with Jacob’s action towards his 2 grandsons (Joseph’s sons), “And now your two sons, Ephraim and Manasseh, who were born to you in the land of Egypt before I came to you in Egypt, are mine; as Reuben and Simeon, they shall be mine.” (Gen 48:5). For Manasseh and Ephraim to be heirs of Jacob’s inheritance, Jacob made them his sons by adoption. That gave them the birthright privileges. This was according to the counsel of his will.
These 2 sons were born in Egypt. They had earthly riches but that could not compare to laying on of hands for blessings and more so adoption. Adoption was greater and super important. No greater honor could have been put on Joseph (type of Christ) than for his sons to be raised to the rank of heads of tribes, on a level with the immediate sons of Jacob (type of God the Father). God did all these “that we who first trusted in Christ should be to the praise of His glory.”(Eph 1:12).