Much of Isaiah 53 focuses on how the cross appears to us - the human perspective. To truly understand it, we have to see what God is doing there. And we can only do that if He reveals it to us. This is precisely what He is doing in and through His word. As we read it, His Spirit in our hearts imparts understanding, and His word changes us. In these last verses we glimpse God's plan for His Son after the cross. And it is glorious.