Why is understanding the nature of Israel important for Christians?

The nature of Israel serves as a theological framework for understanding God's redemptive work throughout history. As discussed in Isaiah 48, God's relationship with Israel—particularly those chosen for salvation—reflects His grace and mercy. The distinction between Israel and other nations is not found in their righteousness but in God's sovereign choosing. This understanding enlightens Christians about their own identity as God's elect, reinforcing the truth that salvation is granted by grace alone. It demonstrates that God's plans involve not only the physical descendants of Israel but also the spiritual Israel, His church, composed of all believers.