Abraham and his Seed received the Promise that He would be Heir of the World (Greek "kosmos").
16 Now to Abraham and his Seed were the Promises made. He does not say, "And to seeds," as of many, but as of one, "And to your Seed," who is Christ.
Jesus came to them and said, "All authority in Heaven and on the Earth has been given to Me."
Now if we are children, then we are heirs — heirs of God and co-heirs with Christ
That is, those who are the children of the flesh, these are not the children of God; but the children of the Promise are counted as the Seed.
And if you are Christ's, then you are Abraham's Seed, and heirs according to the Promise.
The Blessing of Abraham = The Promise = the Holy Spirit of God
That the Blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the Promise of the Spirit through faith.
32 This Jesus hath God raised up, whereof we all are witnesses.
33 Therefore being by the right hand of God exalted, and having received of the Father the Promise of the Holy Ghost, he hath shed forth this, which ye now see and hear.
Now to Him who is able to do exceedingly abundantly above all that we ask or think, according to the Power that works in us,
21 to Him be glory in the Church by Christ Jesus to all generations, forever and ever. Amen.