"Christ has obtained a ministry that is as much more excellent than the old as the covenant he mediates is better, since it is enacted on better promises."

A covenant is a solemn agreement between two parties more binding than a contract. A contract is a 50-50 proposition. If you don’t do your part, I’m no longer obligated to do my part. A covenant typically signifies “I’m committing to you this particular action or truth regardless of what you do, or death is the outcome.”