This prophecy is a disputation, a speech in which the prophet argues a set of points against his audience.
The Lord here calls on Israel to forsake her historic rebelliousness and listen to what he says. The Hebrew word translated listening is often synonymous with obeying or acting upon what is heard.
Israel was religious but not truly committed to the Lord.
Even though Israel had repeatedly failed to believe God’s past predictions, here he revealed new things that were not yet heard. Specifically, God revealed that Babylon would fall and Israel would be restored.
This final trial speech reviews the arguments of chs 40–48 and announces the final conclusion.