1 Timothy 1:8

“But we know that the law is good, etc.] The apostle says this to prevent an objection that might be made to him, that seeing he bore so hard on such who were fond of being teachers of the law, he was himself against the law, and the preaching and proper use of it; but this he would not have concluded, for he and his fellow labourers in the ministry, and all true believers know, from the Scriptures of truth, from the agreement of the law with the Gospel, and from their own experience, that the law is good, provided it be used in a lawful way, and to lawful purposes: and this is to be understood not of the ceremonial law, which was now disannulled, because of the weakness and unprofitableness…”

“But--"Now we know" (Rom 3:19; Rom 7:14). law is good--in full agreement with God's holiness and goodness. if a man--primarily, a teacher; then, every Christian. use it lawfully--in its lawful place in the Gospel economy, namely, not as a means of a "'righteous man" attaining higher perfection than could be attained by the Gospel alone (Ti1 4:8; Tit 1:14), which was the perverted use to which the false teachers put it, but as a means of awakening the sense of sin in the ungodly (Ti1 1:9-10; compare Rom 7:7-12; Gal 3:21).”

“But we know that the law is good - We admit this; it is that which we all concede. This declaration is evidently made by the apostle to guard against the supposition that he was an enemy of the law. Doubtless this charge would be brought against him, or against anyone who maintained the sentiments which he had just expressed. By speaking thus of what those teachers regarded as so important in the law, it would be natural for them to declare that he was an enemy of the law itself, and would be glad to see all its claims abrogated. Paul says that he designs no such thing. He admitted that the law was good. He was never disposed for one moment to call it in question. He only asked that it…”

“We grant the whole Mosaic law is good, answers excellent purposes, if a man use it in a proper manner. Even the ceremonial is good, as it points to Christ; and the moral law is holy, just, and good, on its own nature; and of admirable use both to convince unbelievers, and to guide believers in all holiness. 1 Timothy 1:9”

“the law: Deu 4:6-8; Neh 9:13; Psa 19:7-10, Psa 119:96-105, Psa 119:127, Psa 119:128; Rom 7:12, Rom 7:13, Rom 7:16; Rom 7:18, Rom 7:22, Rom 12:2; Gal 3:21 lawfully: Ti2 2:5 1 Timothy 1:9”