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 itself is holy, and the Commandment is holy, just and good.
Romans 12:2
And do not follow the customs of the present age, but be transformed by the entire renewal of your minds, so that you may learn by experience what God's will is--that will which is good and beautiful and perfect.
Galatians 3:21
God, however, is only one. Is the Law then opposed to the promises of God? No, indeed; for if a Law had been given which could have conferred Life, righteousness would certainly have come by the Law.

Lawfully

2 Timothy 2:5
And if any one takes part in an athletic contest, he gets no prize unless he obeys the rules.