You receive something very special when you accept Christ. You receive a pardon for your sin greater than the pardon any criminal ever received from any governor or president. This pardon is based on none other than the shed blood of Christ.

Ephesians 1:7In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;
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In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace;

When you are quickened (or, made alive) together with Christ, you are forgiven all trespasses: not just some or most, but all! This is why the forgiveness which saved is a completed act of the past and not a repeated act of the present. 

Ephesians 4:32And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you.
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And be ye kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake hath forgiven you.

We are to be “forgiving” (present tense) others as God “hath forgiven” (past tense) us, not as He “forgives” (present tense) us. God forgave all of your sins at salvation: past, present, and future. Therefore, there is no need for a continual forgiving of sins in order to go to heaven. (NOTE: Of course, such complete forgiveness does not remove the need to repent from sins committed after salvation. But this daily cleansing of sins has no effect on salvation.)

Since you receive a full pardon at salvation, you cannot become lost by committing unpardoned sins. There can be no such thing for the saved person. Although you may sin and displease God after your salvation, God knew when He saved you what you would do and forgave you of those sins also. The only way out is to have the pardon which you received at salvation removed from your sin. And so ends step four.