Father Abraham

In order to demonstrate his point about righteousness from the life of Abraham, Paul uses an example from David in the Psalms. However, in David's case, it was not something that was credited to him, but something that was not credited to him. David says such a person is blessed. Paul then addresses the question of what kinds of people are blessed in this way. What is the importance of the timing of Abraham's circumcision to this issue? How long after he was credited with righteousness did God tell Abraham to be circumcised. Given what circumcision is a sign of, why did God wait so long? What does it mean that Abraham is the father of those who believe? (43 min.)