Catholic Dogma Answered Scripturally
All Bible quotations come from the Authorized Version in English AKA the King James Version
Salvation by the Grace of God through
the Faith(acceptance) of the Believer
This subject is of utmost importance. On salvation by grace not only have dogmas (anathemas in the Council of Trent) of the RCC erred, but, also several Protestant denominations have erred being like the Judaizers.
As Christian believers, we hold that our salvation is based on the fulfillment of the Old Testament law of sin by the sacrifice of Jesus, Himself, on the cross at Calvary. By His own admission
"Think not that I am come to destroy the law, or the prophets: I am not come to destroy, but to fulfill. For verily I say unto you, Till heaven and earth pass, one jot or one tittle shall in no wise pass from the law, till all be fulfilled. Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven. For I say unto you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no case enter into the kingdom of heaven." Matthew 5:17-20
"And as Moses lifted up the serpent in the wilderness, even so must the Son of man be lifted up: that whosoever believeth in him should not perish, but have eternal life. For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life. For God sent not his Son into the world to condemn the world; but that the world through him might be saved. He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God." John 3:14-18
So, He explained our salvation as well as that the law of God will not pass away, nor, did He come to do away with the law or the prophets. Therefore, you are saved through any other system than that provided by Jesus above, you are not saved but are a debtor to the law of God given by Moses. It also means that if you come to God by any other reasoning, method, manner or system other than what Jesus has said above, you cannot call yourself a Christian.
Some like the Judeaizers, taught that Christians should keep the :law of Moses" (law of God given to Israel through Moses) or at least parts of the law telling them they should be circumcised. Here is one account from the Acts of the Apostles.
"And when they were come to Jerusalem, they were received of the church, and of the apostles and elders, and they declared all things that God had done with them. But there rose up certain of the sect of the Pharisees which believed, saying, That it was needful to circumcise them, and to command them to keep the law of Moses. And the apostles and elders came together for to consider of this matter. And when there had been much disputing, Peter rose up, and said unto them, Men and brethren, ye know how that a good while ago God made choice among us, that the Gentiles by my mouth should hear the word of the gospel, and believe. And God, which knoweth the hearts, bare them witness, giving them the Holy Ghost, even as he did unto us; and put no difference between us and them, purifying their hearts by faith. Now therefore why tempt ye God, to put a yoke upon the neck of the disciples, which neither our fathers nor we were able to bear? But we believe that through the grace of the Lord Jesus Christ we shall be saved, even as they. Then all the multitude kept silence, and gave audience to Barnabas and Paul, declaring what miracles and wonders God had wrought among the Gentiles by them." Acts 15:4-12
What does Paul tell us of trying to be saved through a system of works or observance of rites?
"For I testify again to every man that is circumcised, that he is a debtor to do the whole law. Christ is become of no effect unto you, whosoever of you are justified by the law; ye are fallen from grace. For we through the Spirit wait for the hope of righteousness by faith. For in Jesus Christ neither circumcision availeth any thing, nor uncircumcision; but faith which worketh by love. Ye did run well; who did hinder you that ye should not obey the truth? This persuasion cometh not of him that calleth you. A little leaven leaveneth the whole lump." Galations 5:3-9 (emphasis added)
We have a direct warning from Paul in this passage which her wrote to answer the Jews who taught that Christians must conform to the law of Moses. It applies to ANY SUCH TEACHING OF LEGALISM OR WORKS, ad infinitem. How, because the principle of salvation through Christ NEVER NEVER NEVER changes. Christians are saved by accepting the sacrifice of Jesus for our sins through an act of faith (Jesus said above, "Believing on Him") otherwise they are subject WITHOUT EXCUSE to the law of God. Paul says the entire law of God not one part. Are we sure of the entire law and not part of it? YES.
"For I testify again to every man that is circumcised, that he is a debtor to do the whole law. " ibid.
Is there guilt involved as in the debt of sin requiring the death of the transgresor of the law? YES. James said,
"If ye fulfill the royal law according to the Scripture, Thou shalt love thy neighbor as thyself, ye do well: but if ye have respect to persons, ye commit sin, and are convinced of the law as transgressors. For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all. For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law. So speak ye, and so do, as they that shall be judged by the law of liberty. For he shall have judgment without mercy, that hath showed no mercy; and mercy rejoiceth against judgment." James 2:8-13
So, we see plainly that if we are not saved by believing in Jesus, we are forced to live by the law of Moses (remember that includes the diet, clothing, holy days and circumcision). That means if we reject Jesus as the atoning sacrifice, we have to keep the WHOLE law of Moses or we are guilty of violating the WHOLE law of Moses. Let's look at this explained completely in Paul's letter to the Galatians.
"And the Scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed. So then they which be of faith are blessed with faithful Abraham. For as many as are of the works of the law are under the curse: for it is written, Cursed is every one that continueth not in all things which are written in the book of the law to do them. But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith. And the law is not of faith: but, The man that doeth them shall live in them. Christ hath redeemed us from the curse of the law, being made a curse for us: for it is written, Cursed is every one that hangeth on a tree: that the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith. Brethren, I speak after the manner of men; Though it be but a man's covenant, yet if it be confirmed, no man disannulleth, or addeth thereto." Gal 3:8-15