We cannot work for or earn our salvation. The Bible is clear in this regard.
"For by grace are ye saved through faith; and that not of yourselves: it is the gift of God:
Not of works, lest any man should boast." - Ephesians 2:8
The Law shows us our sin and our guilt before God, but it cannot save us, only faith in Christ, Who alone perfectly fulfilled the Law can.
"Now we know that what things soever the law saith, it saith to them who are under the law: that every mouth may be stopped, and all the world may become guilty before God.
Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.
But now the righteousness of God without the law is manifested, being witnessed by the law and the prophets;
Even the righteousness of God which is by faith of Jesus Christ unto all and upon all them that believe: for there is no difference:
For all have sinned, and come short of the glory of God;
Being justified freely by his grace through the redemption that is in Christ Jesus:
Whom God hath set forth to be a propitiation through faith in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God;
To declare, I say, at this time his righteousness: that he might be just, and the justifier of him which believeth in Jesus.
Where is boasting then? It is excluded. By what law? of works? Nay: but by the law of faith.
Therefore we conclude that a man is justified by faith without the deeds of the law.
Is he the God of the Jews only? is he not also of the Gentiles? Yes, of the Gentiles also:
Seeing it is one God, which shall justify the circumcision by faith, and uncircumcision through faith.
Do we then make void the law through faith? God forbid: yea, we establish the law." - Romans 3:19-31
Repentance is a turning from dead works (trying to earn salvation) and whatever we were trusting in to to save us, and turning to Christ in faith for salvation.
"Therefore leaving the principles of the doctrine of Christ, let us go on unto perfection; not laying again the foundation of repentance from dead works, and of faith toward God..." - Hebrews 6:1
We must repent of our unbelief and turn to Christ in belief. This is faith. We do not need to stop sinning (keep the Law) to be saved, because, the Bible is clear, no one can do so, and only Christ has perfectly kept and fufilled the Law.
Also, Jesus clearly taught what is required for salvation:
"Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven." - Matthew 7:21
And we can know, from Scripture what the "will of the Father is."
"And this is the Father's will which hath sent me, that of all which he hath given me I should lose nothing, but should raise it up again at the last day.
And this is the will of him that sent me, that every one which seeth the Son, and believeth on him, may have everlasting life: and I will raise him up at the last day." - John 6:39-40
"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
Here some more verses:
"Let us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it.
For unto us was the gospel preached, as well as unto them: but the word preached did not profit them, not being mixed with faith in them that heard it.
For we which have believed do enter into rest, as he said, As I have sworn in my wrath, if they shall enter into my rest: although the works were finished from the foundation of the world.
For he spake in a certain place of the seventh day on this wise, And God did rest the seventh day from all his works.
And in this place again, If they shall enter into my rest.
Seeing therefore it remaineth that some must enter therein, and they to whom it was first preached entered not in because of unbelief:
Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
For if Jesus had given them rest, then would he not afterward have spoken of another day.
There remaineth therefore a rest to the people of God.
For he that is entered into his rest, he also hath ceased from his own works, as God did from his.
Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief." - Hebrews 4:1-11
Jesus is our Sabbath.
"Come unto me, all ye that labour and are heavy laden, and I will give you rest.
Take my yoke upon you, and learn of me; for I am meek and lowly in heart: and ye shall find rest unto your souls.
For my yoke is easy, and my burden is light." - Matthew 11:28-30
And we cannot mix grace with works, or we cancel grace.
"And if by grace, then is it no more of works: otherwise grace is no more grace. But if it be of works, then it is no more grace: otherwise work is no more work." - Romans 11:6
"Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.
Behold, I Paul say unto you, that if ye be circumcised, Christ shall profit you nothing.
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. - Galatians 5:1-9
Our works cannot save us, we must believe, be born again, and sealed with the Holy Spirit unto the day of redemption. Christ really meant it when He said "It is finished!" He did not fail at what He came to do, and He has done it ALL.