the writer would now explain why the covenant Christ has cut in His own blood is better than even the covenant God made with the Israelites at the foot of Mount Sinai, sealed with the blood of sacrificed animals.
Hebrews: Excursus Into Exodus, Part 1
This third directive is so important, the remainder of the chapter rests on it. At the very end of the passage, though, the writer made some startling conclusions which we may find unsettling.