What determines whether one is a child of Abraham?

Answer

"Know you therefore that they which are of faith, the same are the children of Abraham." Gal. 3: 7.
NOTE - Because of unbelief many of the Israelites fell in the wilderness, and were not permitted
to enter the promised land. Num. 14:27-33; Deut. 1:34-36.

What reference is made in the Psalms to Christ's use of parables?
How intimate is His union with believers?
What did God say to Abraham concerning his wife, Sarah?
How was Esther brought up?
What will He then do for each one?
In what condition did David expect to rise?
How extensive will be the reign of Christ?

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