What about this scripture from the writings of Paul:
19Now the works of the flesh are manifest, which are
these; Adultery, fornication, uncleanness, lasciviousness,
20Idolatry, witchcraft, hatred, variance, emulations, wrath, strife, seditions, heresies,
21Envyings, 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.
22But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
23Meekness, temperance: against such there is no law.
24And they that are Christ's have crucified the flesh with the affections and lusts.
If you think you can fornicate and still go to heaven because it is not a law but only a guide then you are wrong.