1 Timothy 1:8

Now we know [without any doubt] that the Law is good, if one uses it lawfully and appropriately,

Romans 7:16

Now if I habitually do what I do not want to do, [that means] I agree with the Law, confessing that it is good (morally excellent).

Romans 7:12-13

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

Deuteronomy 4:6-8

So keep and do them, for that is your wisdom and your understanding in the sight of the peoples who will hear all these statutes and say, ‘Surely this great nation is a wise and understanding people.’

Nehemiah 9:13


“Then You came down on Mount Sinai,
And spoke with them from heaven;
And You gave them fair ordinances and true laws,
Good statutes and commandments.

Psalm 19:7-10


The law of the Lord is perfect (flawless), restoring and refreshing the soul;
The statutes of the Lord are reliable and trustworthy, making wise the simple.

Psalm 119:96-105


I have seen that all [human] perfection has its limits [no matter how grand and perfect and noble];
Your commandment is exceedingly broad and extends without limits [into eternity].

Psalm 119:127-128


Therefore I love Your commandments more than gold,
Yes, more than refined gold.

Romans 7:18

For I know that nothing good lives in me, that is, in my flesh [my human nature, my worldliness—my sinful capacity]. For the willingness [to do good] is present in me, but the doing of good is not.

Romans 7:22

For I joyfully delight in the law of God in my inner self [with my new nature],

Romans 12:2

And do not be conformed to this world [any longer with its superficial values and customs], but be transformed and progressively changed [as you mature spiritually] by the renewing of your mind [focusing on godly values and ethical attitudes], so that you may prove [for yourselves] what the will of God is, that which is good and acceptable and perfect [in His plan and purpose for you].

Galatians 3:21

Is the Law then contrary to the promises of God? Certainly not! For if a system of law had been given which could impart life, then righteousness (right standing with God) would actually have been based on law.

2 Timothy 2:5

And if anyone competes as an athlete [in competitive games], he is not crowned [with the wreath of victory] 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

Deuteronomy 4:6
So keep and do them, for that is your wisdom and your understanding in the sight of the peoples who will hear all these statutes and say, ‘Surely this great nation is a wise and understanding people.’
Nehemiah 9:13

“Then You came down on Mount Sinai,
And spoke with them from heaven;
And You gave them fair ordinances and true laws,
Good statutes and commandments.
Psalm 19:7

The law of the Lord is perfect (flawless), restoring and refreshing the soul;
The statutes of the Lord are reliable and trustworthy, making wise the simple.
Psalm 119:96

I have seen that all [human] perfection has its limits [no matter how grand and perfect and noble];
Your commandment is exceedingly broad and extends without limits [into eternity].
Romans 7:12
So then, the Law is holy, and the commandment is holy and righteous and good.
Romans 12:2
And do not be conformed to this world [any longer with its superficial values and customs], but be transformed and progressively changed [as you mature spiritually] by the renewing of your mind [focusing on godly values and ethical attitudes], so that you may prove [for yourselves] what the will of God is, that which is good and acceptable and perfect [in His plan and purpose for you].
Galatians 3:21
Is the Law then contrary to the promises of God? Certainly not! For if a system of law had been given which could impart life, then righteousness (right standing with God) would actually have been based on law.

Lawfully

2 Timothy 2:5
And if anyone competes as an athlete [in competitive games], he is not crowned [with the wreath of victory] unless he competes according to the rules.