@ghost-of-a-duke said
So not all sins are necessarily evil?
No. Here is another thought on sinning...
What Is Sin?
'The Bible’s answer Sin is any action, feeling, or thought that goes against God’s standards. It includes breaking God’s laws by doing what is wrong, or unrighteous, in God’s sight. (1 John 3:4; 5:17) The Bible also describes sins of omission—that is, failing to do what is right.—James 4:17."
These again are the type of sins that can be forgiven..
Now these example are sins that would be considered as what an evil person would have in their hearts.
WHEN HATRED ENCOMPASSES THE PERSON
"In the above cases the sins do not really express the desire or inward yearnings of the person, but there are others that have become so degraded that they relish their sins and pursue them with deliberateness and in full knowledge of their evilness. They have so merged their personalities with these evils that a separation of the person from the sins is difficult or impossible. They go to an extreme that leaves them in an unforgivable position before Jehovah: “Every kind of sin and blasphemy will be forgiven men, but the blasphemy against the spirit will not be forgiven.” Deliberate and continued sin against the enlightening spirit of Jehovah is not forgivable; defiance of the spirit’s manifest operation is not pardonable. When persons persist in wrongdoing after it has been completely exposed to them, when it becomes so ingrained as to be an inseparable part of their make-up, then hatred for the person that lovingly clings to it as well as the sin must be one’s feeling. How else can it be, when the person and the sin become inseparably and permanently merged?—Matt. 12:31.
Such incorrigible ones reverse the injunction, “Hate the evil, and love the good,” becoming those “who hate the good, and love the evil.” No intercession is to be made for them. “Pray not thou for this people, neither lift up cry nor prayer for them, neither make intercession to me; for I will not hear thee,” says Jehovah. God himself will be “repaying to his face the one who hates him by obliterating him. He will not hesitate toward the one who hates him. He will repay him to his face.” Some reach a point when even strong discipline will not pry loose the evil that has become a part of them. It is no longer possible to destroy the evil and preserve the persons. Both must be destroyed together, since there is no separating them. The evil works truly express and reflect an incorrigibly evil heart. Such persons personify evil, just as God does love. To such Jesus said: “You are from your father the Devil and you wish to do the desires of your father.” In Matthew chapter 23 he scathingly denounced them and asked: “Serpents, offspring of vipers, how are you to flee from the judgment of Gehenna?”—Amos 5:15; Mic. 3:2; Jer. 7:16, AS; Deut. 7:10; John 8:44; Matt. 23:33. Watchtower 7/15