Those who are still in the world think that freedom is to be able to satisfy their desires in whatever way they choose. But they don't realize that they are actually enslaved by those desires. This is why there is conflict in the world. This is why marriages break up. Children raised by hateful parents will themselves likely become hateful, of each other, of their parents, of their teachers, of any person who threatens their freedom and self-will.
Hatred is perhaps the loneliest of sins.
Because by nature, we have hatred in our hearts. Before God saved you, this was what you were like. If your life is still characterized by the description Paul gives in verse 3, then you have not been saved. Don't kid yourself. Paul was no longer the man he used to be after God saved him.