1What then will we say that Abraham, our forefather, has found according to the flesh? 2For if Abraham was justified by works, he has something to boast about, but not toward God. 3For what does the Scripture say? “Abraham believed God, and it was accounted to him for righteousness.” 4Now to him who works, the reward is not counted as grace, but as something owed. 5But to him who doesn’t work, but believes in him who justifies the ungodly, his faith is accounted for righteousness. 6Even as David also pronounces blessing on the man to whom God counts righteousness apart from works:
7“Blessed are they whose iniquities are forgiven,
whose sins are covered.
8Blessed is the man whom the Lord will by no means charge with sin.”
9Is this blessing then pronounced only on the circumcised, or on the uncircumcised also? For we say that faith was accounted to Abraham for righteousness. 10How then was it counted? When he was in circumcision, or in uncircumcision? Not in circumcision, but in uncircumcision. 11He received the sign of circumcision, a seal of the righteousness of the faith which he had while he was in uncircumcision, that he might be the father of all those who believe, though they might be in uncircumcision, that righteousness might also be accounted to them. 12He is the father of circumcision to those who not only are of the circumcision, but who also walk in the steps of that faith of our father Abraham, which he had in uncircumcision.
13For the promise to Abraham and to his offspring that he would be heir of the world wasn’t through the law, but through the righteousness of faith. 14For if those who are of the law are heirs, faith is made void, and the promise is made of no effect. 15For the law produces wrath; for where there is no law, neither is there disobedience.
16For this cause it is of faith, that it may be according to grace, to the end that the promise may be sure to all the offspring, not to that only which is of the law, but to that also which is of the faith of Abraham, who is the father of us all. 17As it is written, “I have made you a father of many nations.” This is in the presence of him whom he believed: God, who gives life to the dead, and calls the things that are not, as though they were. 18Against hope, Abraham in hope believed, to the end that he might become a father of many nations, according to that which had been spoken, “So will your offspring be.” 19Without being weakened in faith, he didn’t consider his own body, already having been worn out, (he being about a hundred years old), and the deadness of Sarah’s womb. 20Yet, looking to the promise of God, he didn’t waver through unbelief, but grew strong through faith, giving glory to God, 21and being fully assured that what he had promised, he was also able to perform. 22Therefore it also was “credited to him for righteousness.” 23Now it was not written that it was accounted to him for his sake alone, 24but for our sake also, to whom it will be accounted, who believe in him who raised Jesus our Lord from the dead, 25who was delivered up for our trespasses, and was raised for our justification.
We first encounter Abraham (father of many nations) as Abram (great father) in Genesis 11:26-31). He was the son of Terah, brother of Nahor and Haran, and uncle of Lot. Abram's brother Haran died while Abram was still in Ur of the Chaldees (Gen 11:28), where also he married Sarai, his half-sister. We discover toward the end of Genesis 11 that his father Terah left Ur, and went to the land of Canaan, via a city named Harana, where Terah died.
The story of Abraham becomes important in chapter 12, in which we are introduced to important biblical characters, locations, and events that set the stage for the remainder of the Bible. Yahweh came to Abram was commanded him to go to a land that He would show him. In this passage, Yahweh sets forth and unilateral and unconditional covenant, in which He promised to make from him a great nation, make his name great, and through him bless all of the families of the earth.[1]
"Abraham (Abram) was first of the patriarchs, father of Isaac and Ishmael, grandfather of Jacob and the traditional ancestor of the Jewish people. Abraham (originally Abram, which means "exalted father") came from Ur in Mesopotamia. His father, Terah, took him (with his wife, Sarah, and his nephew, Lot) to Haran. God called Abraham to leave this new home and to find another home elsewhere in Canaan. After a brief stay in Egypt, Abraham settled near Hebron where he became involved in a local political quarrel when Lot was taken prisoner by an alliance of four eastern chieftains. Abraham launched a successful attack against this confederacy and on his victorious return encountered the mysterious Melchizedek, king of Salem, to whom he gave a tenth of all the spoil he had taken in the battle.
For many years of their marriage, he and Sarah were childless, but God assured Abraham that he would eventually become the father of a great nation. Sarah disbelieved and persuaded Abraham to beget a child by her maid, Hagar, who bore him his first son, Ishmael. When Abraham was ninety-nine years old, God appeared to him, and instituted with him a covenant of circumcision, giving him the new name of Abraham (meaning "father of a multitude") and told him that a son, to be named Isaac was shortly to be born to Sarah. When the boy was in his childhood, God ordered Abraham to take him up to a mountain in the land of Moriah and offer him up as a sacrificial victim. Abraham prepared to do so, but was prevented at the last moment from carrying out the sacrifice, and told that he would be blessed for his faithfulness in being ready to offer up his son.
When Sarah died Abraham bought the plot of ground (the field of Ephron in Machpelah) that became the burial place for many generations of his descendants. He subsequently made arrangements for the marriage of Isaac, and took another wife, Keturah, who bore him Zimran, Medan, Midian, Ishbak and Shuah. At the age of one hundred and seventy five, Abraham died and was buried in Machpelah.
The principal narrative of the part of Genesis dealing with Abraham's history is interrupted in various places by other stories involving the patriarch. These include the parallel stories of his sojourns in Egypt and in Gerar. On both occasions Abraham lied about his relations with Sarah, jeopardising the fulfilment of God's promise (as both Pharaoh and Abimelech intended to take Sarah for themselves), while protecting himself. Both times God intervened to save him from the consequences of his deception. In another story we read of Abraham's intercession on behalf of the cities of Sodom and Gomorrah, which were destroyed for their wickedness."[2]
[1] See Genesis 12:1, for an explanation of God's covenant with Abraham.
[2] Based on the website Mini-Biografias de Personajes Biblicos Web de Recursos Cristianos) (trans. Mini-Biographies of Biblical Characters, Christian Resources Web).