Hi Marlene, just to add to Peter's response, Romans 2:13 is speaking of a spiritual law, and Galatians 2:16 is speaking of a physical law with all its rituals and traditions. Here is a short excerpt that might help explain this.
The Lake of Fire - PART VI The Two Judgments by FIRE
http://www.bible-truths.com/lake6.htmlThe one True Church of the Living God has a "Father" and a "Mediator—Jesus Christ." But does God’s Church have a "Mother?" Ah, Yes, it surely does:
"For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise. Which things are an allegory [a representation of abstract ideas or principles by characters] for these are the TWO COVENANTS; the one from the mount Sinai, which genders to bondage, which is Agar. For this Agar IS [now a metaphor—‘is like, in certain ways’] mount Sinai in Arabia, and answers to JERUSALEM which NOW IS [at the time Paul wrote this and continues to this day] and is in BONDAGE with her children. But Jerusalem which is ABOVE ["The HEAVENLY JERUSALEM" Heb. 12:22] is free, which is THE MOTHER OF US ALL" (Gal. 4:22-26).
What amazing Scriptures these are. The New Covenant Church of the Living God has a MOTHER—HEAVENLY JERUSALEM ABOVE. And the giant Old Covenant Whore Church also has a mother—EARTHLY JERUSALEM BELOW. The New is FREE, whereas the Old is in BONDAGE. But how can I say that the Old Covenant Church is "huge?" Aren’t there only a relatively few orthodox Jews around the world who keep the "Old" Covenant? No, there are BILLIONS of people who keep the "Old" Covenant around the world. There are almost no Christians that understand and keep the "New" Covenant. To the world of Christendom, the Old Covenant IS THE NEW COVENANT! The New Covenant is merely keeping the Old Covenant, BETTER! That’s right. To most, the New Covenant consists of keeping the Old Covenant, better. They say that they now keep the Old Covenant "in the spirit." Just how, pray tell, does one keep the "physical" in the "spirit?"
Such a doctrine is utter unscriptural contradictory nonsense. You cannot keep the "physical" in the "spirit." THERE IS NO SPIRIT IN THE PHYSICAL, SO HOW COULD ONE ‘KEEP IT’ IF IT DOESN’T EXIST? We are all born with a physical [carnal] mind. It is possible to keep physical [carnal] laws with a physical carnal mind (Paul did it to near perfection when he was Saul!). But one CANNOT keep God’s spiritual laws with a physical carnal mind!
"Because the carnal [natural physical] mind is enmity [deep seated HATRED] AGAINST God; for it is NOT subject to the [spiritual] law of God, neither indeed can be" (Rom. 8:7).
"For to be carnally minded is DEATH; but to be spiritually minded is LIFE and peace" (Rom. 8:6).
Let’s be sure that we are perfectly clear on these Scriptural facts:
Paul said that there ARE RIGHT NOW, TWO Jerusalem's in existence.
One answers to the New Covenant, which is HEAVENLY JERUSALEM ABOVE.
One answers to the Old Covenant, which is EARTHLY JERUSALEM IN ISRAEL.
If you think that you can spiritually keep the physical laws of Moses, then your mother is the Old Covenant which answers to "Jerusalem which now is—IN BONDAGE."
But if you are keeping God’s spiritual laws through the spirit of God, then your mother is "Heavenly Jerusalem ABOVE which is—FREE."
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Peace, G.Driggs