1 Timothy 1:8

But we know that the Law is good, if one uses it lawfully,

Romans 7:16

Now if I do what I do not want to do, I agree that the law is good.

Romans 7:12-13

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

Romans 7:18

For I know that nothing good dwells within me, that is, in my flesh. I can will to do what is good, but I cannot do it.

Romans 7:22

For I delight in the law of God, in my inner being,

Romans 12:2

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

Galatians 3:21

Is the law then opposed to the promises of God? Certainly not! For if a law had been given which could impart life, then righteousness would indeed have come by the law.

2 Timothy 2:5

Also if anyone competes as an athlete, he does not win the prize unless he competes according to the rules.

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 the law is holy, and the commandment is holy and just and good.
Romans 12:2
Do not be conformed to this world but be transformed by the renewing of your mind, that you may prove what is the will of God, what is good and acceptable and perfect.
Galatians 3:21
Is the law then opposed to the promises of God? Certainly not! For if a law had been given which could impart life, then righteousness would indeed have come by the law.

Lawfully

2 Timothy 2:5
Also if anyone competes as an athlete, he does not win the prize unless he competes according to the rules.