1 Timothy 1:8

But we know that the law is good if a man use it according to its institution;

Romans 7:16

But if what I would not, that I do, I concur with the law that it is excellent.

Romans 7:12-13

So then the law indeed is holy, and the commandment holy, and just, and good.

Romans 7:18

For I know that there dwelleth not in me (that is, in my flesh) any good thing: for to will is present with me; but how to perform that which is good I find not.

Romans 7:22

For I am delighted with the law of God, as respecting the inward man:

Romans 12:2

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

Galatians 3:21

Is the law then contrary to the promises of God? God forbid. For if there had been a law given which was capable of procuring life, verily righteousness would have been by the law.

2 Timothy 2:5

And if a man contend in the public games, he is not crowned victor, unless he contend according to the laws.

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 indeed is holy, and the commandment holy, and just, and good.
Romans 12:2
And be not conformed to this world, but be transformed by the renovation of your mind, that you may prove by experience what is the will of God, that is good, acceptable, and perfect.
Galatians 3:21
Is the law then contrary to the promises of God? God forbid. For if there had been a law given which was capable of procuring life, verily righteousness would have been by the law.

Lawfully

2 Timothy 2:5
And if a man contend in the public games, he is not crowned victor, unless he contend according to the laws.