1 Timothy 1:8

I know well that "the Law is good" if a man use it lawfully;

Romans 7:16

If then I habitually do what I do not intend to do, I am consenting to the Law, that it is right.

Romans 7:12-13

So then the Law is holy, and the commandment is holy and righteous and good.

Romans 7:18

For I know that in me, that is in my flesh, no good thing has its home; for while to will is present with me, to carry out that which is right is not.

Romans 7:22

For in my inmost self I delight in the law of God;

Romans 12:2

And be not conformed to this world, but be transformed by the renewing of your minds, so that you may prove what is the good and acceptable and perfect will of God.

Galatians 3:21

Is the Law then opposed to the promises of God? Certainly not; for if a law had been given which could make alive, then righteousness would actually have come from law;

2 Timothy 2:5

And again, an athlete is not crowned unless he obeys the rules of the game.

Treasury of Scripture Knowledge

Summary

But we know that the law is good, if a man use it lawfully;

Lawfully

Bible References

The law

Romans 7:12
So then the Law is holy, and the commandment is holy and righteous and good.
Romans 12:2
And be not conformed to this world, but be transformed by the renewing of your minds, so that you may prove what is the good and acceptable and perfect will of God.
Galatians 3:21
Is the Law then opposed to the promises of God? Certainly not; for if a law had been given which could make alive, then righteousness would actually have come from law;

Lawfully

2 Timothy 2:5
And again, an athlete is not crowned unless he obeys the rules of the game.