I don’t believe God’s purpose in specifying a remnant is to limit the number of people who finally enter the gates of his kingdom. (Neither should we.) Other places in Scripture claim that number will be as many as the sand in the sea and the stars in the sky. Rather, God seeks to emphasize that only those who believe, repent, and faithfully (continuously until the end) trust in and follow God as Lord, Savior, and King will be saved. Because God makes a promise to save Israel does not mean that he will save the arrogant, the hard of heart, or those unrepentantly disobedient to his will. That has never been God’s purpose. By means of the cross of his holy Servant, Jesus Christ, God gives everyone–Israelite and Gentile alike–opportunity to repent, be saved, and find their rest in him. …
Switchback–Blessing Disappears: Isaiah Devotional Journal 60
Therefore, the focus is not on the remnant, nor so much upon God’s promise, but upon the Stone, the precious stone, the costly foundation. The focus is also upon belief in him. With this Stone for a foundation, God himself accomplishes what he intended to do. Isaiah grants no blessing to rebellious Israel. …