Without any question, the most straightforward ward and literal meaning of these words is just as openness advocates say it is. God now learned what previously he had not known. When Abraham actually raised the knife, then and only then was God able to say, “now I know” that you fear me. God learned something he had not known before, and this demonstrates that he does not have exhaustive knowledge of the future-so argues the open theist.
Bruce A. Ware. God’s Lesser Glory: The Diminished God of Open Theism (Kindle Locations 584-587). Kindle Edition.