How do we know God's covenant with Israel is true?

Throughout Scripture, God's covenant with Israel is established and upheld by His unchanging character and faithfulness. Romans 11:26 states, 'And so all Israel shall be saved,' indicating a divine promise that encompasses not only physical descendants but also those chosen by grace. The Apostle Paul explains this further, emphasizing that the covenant was made before the foundation of the world, thereby ensuring its certainty and security. The historical accounts of deliverance and the preservation of a faithful remnant throughout Israel's turbulent history serve as witness to God's unwavering commitment to His people. This continuous thread of grace reinforces the assurance that God's promises remain fulfilled in the New Covenant through Christ.