God had a specific purpose for Abram and Sarai and
changed their names to make it clear they would be parents to the
rest of the world. Jesus came to visit them prior to the destruction
of Sodom and Gomorrah in order to remind them of His promise of an
heir. God supernaturally touched Abraham and Sarah to conceive, and
when Isaac finally arrived, he brought a lot of joy to their lives.
Everything was seemingly fine until many years later when the Lord
asked Abraham to sacrifice Isaac on Mount Moriah. God already knew
what was in the heart of Abraham, it's just that he needed to know
for himself in a final test. The latter part of Abraham's life was
used to bury Sarah and make sure that Isaac had the right wife.
Abraham outlived Sarah by 40 years and he started a new family with
a second wife. However, he also had a harem of concubines and
produced children with them as well. Jesus was able to build faith
in Abraham but He was never able to bring Abraham into a moral life.
This father of Israel had joys and regrets about his time on earth
and there is much to learn from this man of faith.