God called Abraham (know as Abram at the time) to come out from his people and all that was familiar to travel to a land he did not know. And he did. At the time when he was childless, God promised he would have descendants that were numberless. And he believed God, in spite of the Hagar/Ishmael chapter of his life, and it was accounted to him for righteousness.
Abraham’s act of believing God, his choice to believe was not based on ignoring the facts. Romans 4:19-21 (AMP) declares, “Without becoming weak in faith he considered his own body, now as good as dead [for producing children] since he was about a hundred years old, and [he considered] the deadness of Sarah’s womb. But he did not doubt or waver in unbelief concerning the promise of God, but he grew strong and empowered by faith, giving glory to God, being fully convinced that God had the power to do what He had promised.” And God did.
The nation of Israel was born out of Abraham’s seed and God made it clear to all the other nations around, including the one He delivered them out of, in keeping with His promise to Abraham, that they were His people. To have the honor of being called God’s people must surely mean that He chose them because they were special, extraordinary, above average, right? Not so. Hear Moses speaking clearly to them, “The Lord did not set His heart on you and choose you because you were more numerous than other nations, for you were the smallest of all nations! Rather, it was simply that the Lord loves you, and He was keeping the oath He had sworn to your ancestors.” (Deuteronomy 7:7-8, NLT).
It is the same with us. He loves us because He chose to love us. And it is His choice that transforms us, making it possible for ordinary people to do extraordinary things, through Him. “ Brothers and sisters,” the Apostle Paul instructs us through his words first spoken to the Corinthian church, “think of what you were when you were called. Not many of you were wise by human standards; not many were influential; not many were of noble birth. But God chose the foolish things of the world to shame the wise; God chose the weak things of the world to shame the strong. God chose the lowly things of this world and the despised things—and the things that are not—to nullify the things that are, so that no one may boast before Him. It is because of Him that you are in Christ Jesus, who has become for us wisdom from God—that is, our righteousness, holiness and redemption. Therefore, as it is written: “Let the one who boasts boast in the Lord.” And let all of us ordinary people say, “Amen!”