Commentators emphasize that Isaiah uses simple, powerful logic to expose the absurdity of idolatry. The same log is used for common, practical tasks like cooking a meal and warming oneself. The prophet highlights the irrationality of then taking the leftover piece, a mere object that served human needs, and worshipping it as a divine savior. As Charles Spurgeon notes, this clear description has historically been effective in showing people the foolishness of their idols.