But Jerusalem which is above is free, which is the mother of us all.

For it is written, Rejoice, thou barren that bearest not; break forth and cry, thou that travailest not: for the desolate hath many more children than she which hath an husband.

Now we, brethren, as Isaac was, are the children of promise." (Galatians 4:22-28) Isaac pictures the entire Christ, head and body--Jesus the Head, the church the body members.
[104]It is noted that God's covenant with Abraham stated that there would be an offspring or seed which would bless all the families of the earth.

This seed is the Redeemer, Christ Jesus, the Savior of the world; and by adoption into the family of God the true Christians, the church, the members of Christ's body, become a part of that seed.

"And the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed.