Who constitute the true Israel, or seed of Abraham?

Answer

"They are not all Israel, which are of Israel: neither, because they are the seed of Abraham, are they all
children: but, In Isaac shall thy seed be called. That is, they which are the children of the flesh, these are
not the children of God: but the children of the promise are counted for the seed." Verses 6-8.

In what language did Isaiah foretell Christ's birth?
Whose presence does the Holy Spirit bring to the believers?
Concerning what subject ought we to be informed?
For what have we been taught to pray?
Do Protestant writers acknowledge the same?
Still bent on persecution, how does Satan manifest his enmity against the remnant church?
Who will be permitted to enter it?

Questions & Answers are from the book Bible Readings for the Home Circle