Chapter 12 is a chapter of great encouragement and warning concerning the endurance and sanctification of the Hebrew Christians. The previous chapter made a compelling case that faith is what pleases God. When we remember the many examples of faithful people from the Old Testament, we should feel strengthened to live the rest of our lives with endurance. When we experience suffering for our faith, we should be encouraged by the mindset that God is using our suffering to teach us and to grow us up. Since we have these examples of faithful people, and of Christ, and since we know our identity is in Heaven where Christ mediates our New Covenant, we can live lives of acceptable service to God. Nothing should stop us from enduring and reaching spiritual maturity.