I found this on my e-sword this commentary from Hoekstra.
Christ has obtained a more excellent ministry, inasmuch as He is also Mediator of a better covenant, which was established on better promises. For if that first covenant had been faultless, then no place would have been sought for a second. Because finding fault with them, He says: “Behold, the days are coming,” says the Lord, “when I will make a new covenant with the house of Israel and with the house of Judah.” (Heb_8:6-8)
These verses contrast the old covenant of law (“that first covenant”) with the new covenant of grace (“a second”). The old covenant of law is good, but the new covenant of grace is far better. The law is ordained of God, but it can never bring to people what God desires for them to experience.
The law is good, but only if it used properly. “We know that the law is good if one uses it lawfully, knowing this: that the law is not made for a righteous person, but for the lawless and insubordinate, for the ungodly and for sinners” (1Ti_1:8-9). The lawful use of God’s law pertains to the unrighteous, the rebellious. The law is not designed to give people a righteous standing in God’s sight (justification). “Knowing that a man is not justified by the works of the law but by faith in Jesus Christ” (Gal_2:16). Nor is the law intended for developing a godly walk (sanctification) in those who are justified through faith in Christ. “For the law made nothing perfect” (Heb_7:19). The proper use of the law is to lead people to the grace of God found in Jesus Christ. “The law was our tutor to bring us to Christ” (Gal_3:24).
Grace is far better than law. If the law was without lack, then God would never have sent His Son to die for the establishing of a new covenant. “For if that first covenant had been faultless, then no place would have been sought for a second.” Since the law was lacking (regarding justification and sanctification), God’s plan included the new covenant of grace. “Because finding fault with them, He says: ‘Behold, the days are coming,’ says the Lord, ‘when I will make a new covenant’.” The new covenant of grace has Jesus, the giver of life, as the Mediator. “He has obtained a more excellent ministry, inasmuch as He is also Mediator of a better covenant.” This new covenant also has greater promises than the law: “a better covenant, which was established on better promises.” In the days ahead, we will examine the better aspects of the grace of God.
Dear Father, I agree with You that Your law is good. It tutored me to Your magnificent grace. Lord, teach me the better aspects of Your grace, that I might fully embrace all that You want to accomplish in and through my life, in Jesus name, Amen.