How do we know God's mercy is true as seen in Daniel 9?

Daniel 9 displays God's mercy vividly as Daniel appeals to God's character, stating that He is a God of mercy and forgiveness. Despite Israel's rebellion and sin, Daniel bases his plea for restoration on God's faithfulness to His covenant. He acknowledges that righteousness belongs to God while expressing that their only hope lies in God's great mercies, emphasizing that redemption comes not from human efforts but solely through divine grace. This framework highlights the unwavering nature of God's mercy as rooted in His legitimate righteous judgment.