Yet it was the will of the Lord to crush him; he has put him to grief; when his soul makes an offering for guilt, he shall see his offspring; he shall prolong his days; the will of the Lord shall prosper in his hand. Isaiah 53.10 ESV
Isaiah speaks of the suffering servant in terms of the people of Israel, of the remnant, and finally of a single person. He narrows the identification of the servant until he arrives in chapter 53. In this chapter, he reveals details of how the servant would suffer for the sins of others.
This will of the Lord is his perfect plan. Making the servant suffer was according to the divine plan. At every turn, God is in control of the unfolding of events.
Now, animal sacrifices under the Mosaic system begin to make sense. It will be the servant who gives his life as an offering for guilt. The solution will be the human sacrifice of the servant, pouring out his life to death in order to justify man, verses 11-12.
In this process, his life is cut off from the earth and it appears he will have no descendants, verse 8, but he will have them at last—the people formed from his redemption, the new Israel of God, Galatians 6.10, 16, the church of the Lord, Matthew 16.18. His people are those who receive him in order to become God’s children, John 1.12-13.
In this way, God’s plan will succeed when he completes it on the cross. All who go to him in his death will be counted as his offspring and with him will prolong their days.
God of the perfect plan, I want to be a part of Jesus’ descendants, through his offering of himself on the cross.