What does it mean that the gospel is for the lost sheep of Israel?

When Jesus instructs His disciples to go to the lost sheep of the house of Israel, it underscores the idea of God's elect. He sent the gospel first to the Jews, and later to the Gentiles, demonstrating the line of His covenant grace. This concept is rooted in God's sovereignty, where He chooses those whom He will save, often referred to as the 'elect'. The preaching of the gospel is directed toward these lost sheep, who will respond to the Shepherd's voice and follow Him. This draws on the profound biblical theme of divine election and the assurance that God's grace extends to all whom He has chosen.