Let's look at it in proper details.
2 Corinthians 3:3-6 ...'Forasmuch as ye are manifestly declared to be the epistle of Christ ministered by us, written not with ink, but with the Spirit of the living God; not in tables of stone, but in fleshy tables of the heart. And such trust have we through Christ to God-ward: Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God; Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life.'
The first point to make here is this. By what did Moses 'minister' to the Israelites? It was the 'letter' of the law right? The Israelites were governed by the letter of the law. And what did the letter of the law do?
Exodus 31:14 ...'Ye shall keep the sabbath therefore; for it is holy unto you: every one that defileth it shall surely be put to death: for whosoever doeth any work therein, that soul shall be cut off from among his people.'
Can you see here how the 'letter' of the law killeth? This is how the Israelites were governed in the Old Testament. We are told by John that 'sin is the transgression of the law' (1 John 3:4), and Ezekiel 18:20 says that the 'soul that sinneth, it shall die.' So what does the letter of the law do when we look at it? It shows that we are worthy of death, because we have all transgressed the law of God. Paul said himself in Romans 7:9-11 that when the commandment came, he 'died' and it 'slew him.' This is what that 'mirror', that 'schoolmaster' is supposed to do - to show us our sin and defects of character. But that is as far as the written
law in of itself can go. So if there was nothing else, only the written 'letter' of the law, what would it do to us? It would slay us! This is because the law is 'holy and good' (Romans 7:12), and we are not. But there is no provision within the written ten commandments itself to save us. It merely shows us what is right and what is sin.
Now please note the context of what Paul says in verses 3-6 above. He is talking of how the apostles are ministers of the new testament. So the context is about 'ministration.' This will help with the following verses of 2 Corinthians 3.
2 Corinthians 3:7-11 ...'But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away: How shall not the ministration of the spirit be rather glorious? For if the ministration of condemnation be glory, much more doth the ministration of righteousness exceed in glory. For even that which was made glorious had no glory in this respect, by reason of the glory that excelleth. For if that which is done away was glorious, much more that which remaineth is glorious.'
It is amazing how many people look at those words ... 'written and engraven in stones' ... and 'done away' and apply this to meaning that the ten commandments are now 'done away with', without even looking at all the other words in these verses. Do you see why I mentioned to look at the context of what Paul was saying in verses 3 to 6? That he was talking about 'ministration'? And now look at verses 7 to 11 above. What is the context? 'MINISTRATION.' Look at what Paul is saying. He is NOT saying that the ten commandments were 'done away.' He is saying that the ministration of the ten commandments was done away. And what ministration was that? The ministration of Moses.
What was the 'glory' which was 'to be done away' according to the above verses? The glory of Moses' counternance, not the ten commandments. Moses had just been in the presence of God on the mount, and his counternance shone with the glory of God's righteousness, to which the written law is a transcript of. But instead of seeing the righteousness of God through the law and the work that Christ was to do for them, the Israelites simply looked to Moses and the written law. They couldn't see past Moses to Christ and what Christ was to do for them. They could not bear even the sight of Christ's glory through Moses' face, and this is why Moses had to put a veil over his face.
2 Corinthians 3:12-16 ...'Seeing then that we have such hope, we use great plainness of speech: And not as Moses, which put a veil over his face, that the children of Israel could not stedfastly look to the end of that which is abolished: But their minds were blinded: for until this day remaineth the same vail untaken away in the reading of the old testament; which vail is done away in Christ. But even unto this day, when Moses is read, the vail is upon their heart. Nevertheless when it shall turn to the Lord, the vail shall be taken away.'
First of all, where was the veil placed? Was it placed over the tablets of stone with the ten commandments? No, it was placed over the face of Moses. And what did that veil cover? It covered the 'dimmed' glory of Christ's righteousness that shone through Moses' face. This is what the Israelites could not see and this is what was to be 'abolished' - the 'glory' of the ministration of Moses (man) on behalf of Jesus Christ and which pointed to the ministration of Christ Himself in the new testament covenant.
Paul is not saying the ten commandments were abolished in the new testament covenant. Because Paul even said himself in Romans 3:31 ...'Do we then make void the law through faith? God forbid: yea, we establish the law.' How can you 'establish' something that is 'abolished'? No, Paul is clearly saying in 2 Corinthians 3 that it was the ministration of the law which was to be abolished - the ministration of MAN. This was replaced by the ministration of the Spirit - of Jesus Christ Himself.
Think about it! What could Moses and the priestly service of the Levites do for man? Could they write the law upon the hearts of men? No, they could do no more than what the written law itself can do for us? Show us our sin and point us to Christ. But what can Christ Himself, through the ministration of the Spirit do for us? Write the law upon our hearts and GIVE US LIFE! This is why the 'ministration' of man through the written letter had to be 'abolished' and replaced with the ministration of the Spirit. But what remains constant through all of this? THE LAW OF GOD.
Don't just skim the verse and highlight the area trying to make it say something it is NOT. You simply highlight the word glory at one place and engraved in stones and simply IGNORE the rest of the text. This is how Eve was deceived in the garden.