Mormonism and the ancestry of gods

My friend Alex found this on LDS.org, from the New Era, April 1971:

“Long before our God began his creations, he dwelt on a mortal world like ours, one of the creations that his Father had created for him and his brethren. He, with many of his brethren, was obedient to the principles of the eternal gospel. One among these, it is presumed, was a savior for them, and through him they obtained a resurrection and an exaltation on an eternal, celestial world. Then they gained the power and godhood of their Father and were made heirs of all that he had, continuing his works and creating worlds of their own for their own posterity—the same as their Father had done before, and his Father, and his Father, and on and on…

“Being joint-heirs of all that the Father has, we may then look forward to using those powers to organize still other worlds from the unorganized matter that exists throughout boundless space. Creating other worlds, peopling them with our own eternal posterity, providing a savior for them, and making known to them the saving principles of the eternal gospel, that they may have the same experiences we are now having and be exalted with us in their turn—this is eternal life.” (https://www.lds.org/new-era/1971/04/people-on-other-worlds)

He quotes the Sermon in the Grove (where Joseph Smith taught that the Father has a Father), and “Hie to Kolob”:

“D’ye think that you could ever,
Through all eternity,
Find out the generation
Where Gods began to be?”

Contrast:

“Before me no god was formed, nor shall there be any after me.” (Isaiah 43:10)

“I am the first and I am the last; besides me there is no god.” (Isaiah 44:6)