Although the people of Israel had grumbled against Moses, although they had been difficult to lead, Moses stepped forward as the mediator they needed. But don’t just marvel in what Moses did but how he did it as well.
Notice that as Moses pleaded for the people, his argument for sparing the people was comprised of three main points: (1) they were God’s people, (2) God would not be glorified if He were to wipe them out, and (3) God had made promises to this people. Not a single argument was made on behalf of the people. Not a single promise that they would do better. Not a single excuse for their lapse of obedience. The reason was because none were warranted. Moses could offer no reason why the people did not deserve judgment; plus, grace does not work that way.
And so it is with the gospel. Christ is our mediator, and He makes constant appeals to the Father on our behalf, not based on what we have done or might do but on what He has done and the righteousness He has given us.
How might you be prone to try to rest in your work instead of in Christ’s work on your behalf? Why?