1 Timothy 1:8

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

Romans 7:16

But, if what I wish not, this I do, I consent to the law that it is good.

Romans 7:12-13

So that the law is holy, and the command is holy and righteous and good.

Romans 7:18

For I know that there dwells not in me, that is, in my flesh, any good; for to wish is present with me: but to do that which is good a not.

Romans 7:22

or I delight in the law of God after the inward man;

Romans 12:2

and he not conformed to this age, but be transformed by the renewing of your mind, that ye may prove what is the good and well-pleasing and perfect will of God.

Galatians 3:21

Is the law, then, against the promises of God? It could not be! For, if a law had been given, which was able to make alive, truly righteousness would have been by law;

2 Timothy 2:5

And, if also one contends in the games, he is not crowned, unless he contends lawfully.

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 that the law is holy, and the command is holy and righteous and good.
Romans 12:2
and he not conformed to this age, but be transformed by the renewing of your mind, that ye may prove what is the good and well-pleasing and perfect will of God.
Galatians 3:21
Is the law, then, against the promises of God? It could not be! For, if a law had been given, which was able to make alive, truly righteousness would have been by law;

Lawfully

2 Timothy 2:5
And, if also one contends in the games, he is not crowned, unless he contends lawfully.