1 Timothy 1:8

We know, of course, that the Law is excellent, when used legitimately,

Romans 7:16

But when I do what I want not to do, I am admitting that the Law is right.

Romans 7:12-13

And so the Law is holy, and each Commandment is also holy, and just, and good.

Romans 7:18

I know that there is nothing good in me-I mean in my earthly nature. For, although it is easy for me to want to do right, to act rightly is not easy.

Romans 7:22

At heart I delight in the Law of God;

Romans 12:2

Do not conform to the fashion of this world; but be transformed by the complete change that has come over your minds, so that you may discern what God's will is--all that is good, acceptable, and perfect.

Galatians 3:21

Does that set the Law in opposition to God's promises? Heaven forbid! For, if a Law had been given capable of bestowing Life, then righteousness would have actually owed its existence to Law.

2 Timothy 2:5

No athlete is ever awarded the wreath of victory unless he has kept 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
And so the Law is holy, and each Commandment is also holy, and just, and good.
Romans 12:2
Do not conform to the fashion of this world; but be transformed by the complete change that has come over your minds, so that you may discern what God's will is--all that is good, acceptable, and perfect.
Galatians 3:21
Does that set the Law in opposition to God's promises? Heaven forbid! For, if a Law had been given capable of bestowing Life, then righteousness would have actually owed its existence to Law.

Lawfully

2 Timothy 2:5
No athlete is ever awarded the wreath of victory unless he has kept the rules.