Cyrill of Alexandria
Ephraim, along with the house of Israel and Judah, finds itself under God's gaze. In His inherent goodness and mercy, God does not wish to punish anyone; however, His righteous indignation arises from encountering an overwhelming multitude of transgressions among them. This truth is echoed in His words. He perceives the numerous deceptions and moral corruption rampant among Ephraim and Judah, wherever He directs His divine attention. He regards the pleasures of idolatry and meaningless worship as lies, and possibly sees the arrogance directed against Him as the height of impiety.
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It is indeed shocking and disgraceful to forsake the One who is truly God by nature, in favor of lifeless objects like trees and stones, or to honor created things rather than the Creator, as stated in Romans 1:25. God declares, "I know God," signifying His awareness that His holy temple is to be revered. He observes that the house of Ephraim and Judah has tarnished His name with falsehoods and wickedness. Yet, in response to their misdeeds, He chooses to remain good and just. He understands that they can only be transformed through experiencing severe trials that awaken the conscience of the wayward. His statement "I know God" reflects His understanding of the means of guiding them towards beneficial instruction. This guidance will not prove fruitless; instead, they will become like holy temples. Once they undergo the purification that comes from enduring hardship, they will be sanctified and will realize that genuine love for God brings the promise of comfort and prosperity, while their sins lead them into the depths of bondage and despair.