17 As it is written: "I have made you a father of many nations." He is our father in the sight of God, in whom he believed-the God who gives life to the dead and calls into being things that were not.
17 (As it is written, I have made thee a father of many nations,) before him whom he believed, even God, who quickeneth the dead, and calleth those things which be not as though they were.
English Standard Version
17 as it is written, "I have made you the father of many nations"--in the presence of the God in whom he believed, who gives life to the dead and calls into existence the things that do not exist.
17 We call Abraham "father" not because he got God's attention by living like a saint, but because God made something out of Abraham when he was a nobody. Isn't that what we've always read in Scripture, God saying to Abraham, "I set you up as father of many peoples"? Abraham was first named "father" and then became a father because he dared to trust God to do what only God could do: raise the dead to life, with a word make something out of nothing.
New King James Version
17 (as it is written, "I have made you a father of many nations") in the presence of Him whom he believed--God, who gives life to the dead and calls those things which do not exist as though they did;
New Living Translation
17 That is what the Scriptures mean when God told him, "I have made you the father of many nations." This happened because Abraham believed in the God who brings the dead back to life and who creates new things out of nothing.
The promise was made to Abraham long before the law. It points at Christ, and it refers to the promise, Genesis 12:3. In Thee shall all families of the earth be blessed. The law worketh wrath, by showing that every transgressor is exposed to the Divine displeasure. As God intended to give men a title to the promised blessings, so he appointed it to be by faith, that it might be wholly of grace, to make it sure to all who were of the like precious faith with Abraham, whether Jews or Gentiles, in all ages. The justification and salvation of sinners, the taking to himself the Gentiles who had not been a people, were a gracious calling of things which are not, as though they were; and this giving a being to things that were not, proves the almighty power of God. The nature and power of Abraham's faith are shown. He believed God's testimony, and looked for the performance of his promise, firmly hoping when the case seemed hopeless. It is weakness of faith, that makes a man lie poring on the difficulties in the way of a promise. Abraham took it not for a point that would admit of argument or debate. Unbelief is at the bottom of all our staggerings at God's promises. The strength of faith appeared in its victory over fears. God honours faith; and great faith honours God. It was imputed to him for righteousness. Faith is a grace that of all others gives glory to God. Faith clearly is the instrument by which we receive the righteousness of God, the redemption which is by Christ; and that which is the instrument whereby we take or receive it, cannot be the thing itself, nor can it be the gift thereby taken and received. Abraham's faith did not justify him by its own merit or value, but as giving him a part in Christ.