Did you not read my post? Evil and sin are not the same thing, they are related but sin comes out from evil.
James 1:15
Then, when desire has conceived, it gives birth to sin; and sin, when it is full-grown, brings forth death.
When we reject the truth and construct a lie to justify that rejection we are being evil and out from that comes our practice of sin. Adam rejected God's word (you shall not die) which, was evil and ate the fruit which, was sin.
This is why the scripture says those who continually practice sin don't know the Lord because in order to do that you have to constantly embrace evil (ie. reject the truth).
1 John 3:6
No one who lives in him keeps on sinning. No one who continues to sin has either seen him or known him.
Just because we are born sinners and in unbelief doesn't mean we are not believers. This is why the Lord meets us with grace and truth in order to reveal who we are.
There are only two types of people in the world believers and unbelievers. Some of those believers simply don't know it yet.

This is why we preach the Gospel.
Rejection of the Lord God which is evil, is never forgiven because not even the Lord Jesus can pay for that as He cannot reject Himself. He stood in our place in death, He cannot stand in our place if we embrace evil. Evil can only be removed permanently hence, the lake of fire, an eternal prison.