God wrote the Ten Commandments on a block of stone

FH:
If the keeping the law could save, Jesus died in vain....

I didn't say the law could save.

that you don't know this much speaks volumes....

First quote me saying what you claim and then you can claim that I don't know something.

21 I do not set aside the grace of God; for if righteousness comes through the law, then Christ died in vain.”

Scripture does not contradict itself:

Romans 2:13

King James Version (KJV)
¹³ (For not the hearers of the law are just before God, but the doers of the law shall be justified.

Therefore the message is clear.
1. Those who do not keep the Commandments will not be saved.
2. Those who do will be saved, by God. Not by the Commandments.
3. The Commandments are the line between salvation and condemnation. Those who keep the Commandments will be saved by God. Those who don't, will be condemned:
Revelation 22:13-15

King James Version (KJV)
¹³ I am Alpha and Omega, the beginning and the end, the first and the last.
¹⁴ Blessed are they that do his commandments, that they may have right to the tree of life, and may enter in through the gates into the city.
¹⁵ For without are dogs, and sorcerers, and whoremongers, and murderers, and idolaters, and whosoever loveth and maketh a lie.

Salvation is by grace through faith...

But not by faith alone.

always has been always will be....

Agreed. By faith which works by love:
Galatians 5:6

King James Version (KJV)
⁶ For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love.

if you think you are going to be saved by keeping the commandments, you won't be saved.

On the contrary, if you think you will be saved by not keeping the Commandment, you won't be saved:
Deuteronomy 7:9

King James Version (KJV)
⁹ Know therefore that the Lord thy God, he is God, the faithful God, which keepeth covenant and mercy with them that love him and keep his commandments to a thousand generations;

Read that carefully. God will save those who keep His Commandments. 

8 For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, 9 NOT OF WORKS, lest anyone should boast.

Read this:
Luke 18:9

King James Version (KJV)
⁹ And he spake this parable unto certain which trusted in themselves that they were righteous, and despised others:

We do not rely upon ourselves or our works, but upon God.
Luke 18:10-14

King James Version (KJV)
¹⁰ Two men went up into the temple to pray; the one a Pharisee, and the other a publican.
¹¹ The Pharisee stood and prayed thus with himself, God, I thank thee, that I am not as other men are, extortioners, unjust, adulterers, or even as this publican.
¹² I fast twice in the week, I give tithes of all that I possess.
¹³ And the publican, standing afar off, would not lift up so much as his eyes unto heaven, but smote upon his breast, saying, God be merciful to me a sinner.
¹⁴ I tell you, this man went down to his house justified rather than the other: for every one that exalteth himself shall be abased; and he that humbleth himself shall be exalted.

This parable exactly describes Protestants. Because they rely upon their claim of faith. But not upon God.

10 For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.

This is key. We are created for good works. CREATED. 

John 1:3

King James Version (KJV)
³ All things were made by him; and without him was not any thing made that was made.

Even those who are not baptized are made for good works. Even those who are not justified are made for good works:
Romans 2:15

King James Version (KJV)
¹⁵ Which shew the work of the law written in their hearts, their conscience also bearing witness, and their thoughts the mean while accusing or else excusing one another

5 NOT BY WORKS OF RIGHTEOUSNESS THAT WE HAVE DONE, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit, 6 whom He poured out on us abundantly through Jesus Christ our Savior, 7 that having been justified by His grace we should become heirs according to the hope of eternal life.

This is a reference to Baptism, the washing of regeneration and renewing of the Holy Spirit in the Sacraments. They are God's work of mercy.

8 Therefore do not be ashamed of the testimony of our Lord, nor of me His prisoner, but share with me in the sufferings for the gospel according to the power of God, 9 who has saved us and called us with a holy calling, NOT ACCORDING TO OUR WORKS, but according to His own purpose and grace which was given to us in Christ Jesus before time began,

In other words, God's plan of salvation does not depend upon what we do. Jesus came to save us from sin precisely because we did not do the works which God commanded.

50 Go in peace. YOUR FAITH HAS SAVED YOU.

When we present ourselves to Christ in the Sacraments, He tells us the same thing:
Mark 16:16

King James Version (KJV)
¹⁶ He that believeth and is baptized shall be saved; but he that believeth not shall be damned.

BTW, There are over 600 commandments, not just 10....do you keep them all?

But God only wrote Ten.
Those are the most important ones.
Deuteronomy 4:13

King James Version (KJV)
¹³ And he declared unto you his covenant, which he commanded you to perform, even ten commandments; and he wrote them upon two tables of stone.

Sincerely,

De Maria