If you think you can live in sin willfully, living an unholy life contrary to God's will and still be saved, you are wrong.
It is all about having a good conscience toward God. That is why Christ died for our sins so that we could receive atonement for them. Meaning to appease God's anger toward us because our sins. If after being forgiven of our sins and we continue on in them willfully we are told in Hebrews 10:26-31
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26 For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins,
27 But a certain fearful looking for of judgment and fiery indignation, which shall devour the adversaries.
28 He that despised Moses' law died without mercy under two or three witnesses:
29 Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?
30 For we know him that hath said, Vengeance belongeth unto me, I will recompense, saith the Lord. And again, The Lord shall judge his people.
31 It is a fearful thing to fall into the hands of the living God."
Sin accidentally happens sometimes but we are to grow in purity and faith more and more until our last day, striving to be perfect until we are actually made on the day of judgment. If we sin, repent. But to those who willfully sin thinking you can have pleasure in unrighteousness and still be saved, you will be damned just as God tells us.