Final answer:
According to the chapter in Jeremiah, when God does what he says he will do in the hearts of his people, it will result in their knowledge of God and his power.
Step-by-step explanation:
In the chapter of Jeremiah that discusses God's actions in the time of eschatological salvation, it states that when God does what he says he will do in the hearts of his people, it will result in their knowledge of God and his power. This is illustrated in Ezekiel 6:12-13 where God says that as a result of his wrath, the people will know that he is the Lord. Similarly, in Ezekiel 20:26, God allows the Israelites to defile themselves in order to horrify them and make them understand his power.