Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned: (Romans 5:12)

Now the works of the flesh are manifest, which are these; Adultery, fornication, uncleanness, lasciviousness, idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies, envyings, murders, drunkenness, revellings, and such like: of the which I tell you before, as I have also told you in time past, that they which do such things shall not inherit the kingdom of God. (Galatians 5:19-21)

For all have sinned, and come short of the glory of God; (Romans 3:23)

For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord. (Romans 6:23)

In the beginning was the Word, and the Word was with God, and the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. In him was life; and the life was the light of men. (John 1:1-4)

And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. (John 1:14)

Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me. (John  14:6)

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  3:15-18)

But God commendeth his love toward us, in that, while we were yet sinners, Christ died for us. (Romans 5:8)

So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation. (Hebrews 9:28)

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. (Romans 3:20)

And almost all things are by the law purged with blood; and without shedding of blood is no remission. (Hebrews 9:22)

And he is the propitiation for our sins: and not for our's only, but also for the sins of the whole world. (1 John  2:2)

But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin. (1 John 1:7)

Then spake Jesus again unto them, saying, I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life. (John 8:12)

Marvel not that I said unto thee, Ye must be born again. (John 3:7)

I am the door: by me if any man enter in, he shall be saved, and shall go in and out, and find pasture. (John 10:9)

Verily, verily, I say unto you, He that entereth not by the door into the sheepfold, but climbeth up some other way, the same is a thief and a robber. (John 10:1)

(For he saith, I have heard thee in a time accepted, and in the day of salvation have I succoured thee: behold, now is the accepted time; behold, now is the day of salvation.) (2 Corinthians 6:2)

But when Jesus saw it, he was much displeased, and said unto them, Suffer the little children to come unto me, and forbid them not: for of such is the kingdom of God. (Mark 10:14)

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 2:8-9)

Knowing that a man is not justified by the works of the law, but by the faith of Jesus Christ, even we have believed in Jesus Christ, that we might be justified by the faith of Christ, and not by the works of the law: for by the works of the law shall no flesh be justified. (Galatians 2:16)

I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.  (Galatians 2:21)

                Webster's Dictionary 1828 - Online Edition

                Righteousness      -  the quality or condition of being righteous or just
                                                - The cause of our justification.

The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. (2 Peter 3:9)

Being justified freely by his grace through the redemption that is in Christ Jesus: (Romans 3:24)

Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will sup with him, and he with me. (Revelation 3:20)

Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. (Acts 2:38)

Repent - metanoeō

met-an-o-eh'-o

From G3326 and G3539; to think differently or afterwards, that is, reconsider (morally to feel compunction):—repent.

And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized? And Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God. (Acts 8:36-37)

But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name: (John 1:12)

For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. (Romans 10:10)

For whosoever shall call upon the name of the Lord shall be saved. (Romans 10:13)

If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness. (1 John 1:9)  

                Acknowledge that you are a sinner

                Acknowledge that Jesus is the Son of God and that he died for your sin

                Ask Jesus to forgive your sin, to come into your life and make you a new creation

                Your name is now written in the Book of Life

Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new. (2 Corinthians 5:17) 

And I intreat thee also, true yokefellow, help those women which laboured with me in the gospel, with Clement also, and with other my fellowlabourers, whose names are in the book of life.  (Philippians 4:3)

And the devil that deceived them was cast into the lake of fire and brimstone, where the beast and the false prophet are, and shall be tormented day and night for ever and ever. (Revelation 20:10)

And whosoever was not found written in the book of life was cast into the lake of fire. (Revelation 20:15)

For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them. (Ephesians 2:10)

For it is God which worketh in you both to will and to do of his good pleasure. (Philippians 2:13)