How can someone believe in Jesus?

What the bible actually says about sin:

Rom 6:11 Likewise reckon ye also yourselves to be dead indeed unto sin, but alive unto God through Jesus Christ our Lord.

Rom 6:12 Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof.

Rom 6:13 Neither yield ye your members [as] instruments of unrighteousness unto sin: but yield yourselves unto God, as those that are alive from the dead, and your members [as] instruments of righteousness unto God.

Rom 6:14 For sin shall not have dominion over you: for ye are not under the law, but under grace.

Rom 6:15 ¶ What then? shall we sin, because we are not under the law, but under grace? God forbid.

Rom 6:16 Know ye not, that to whom ye yield yourselves servants to obey, his servants ye are to whom ye obey; whether of sin unto death, or of obedience unto righteousness?

Rom 6:17 But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.

Rom 6:18 Being then made free from sin, ye became the servants of righteousness.