For rebellion is as the sin of witchcraft, and stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the LORD, he hath also rejected thee from being king. 1 Samuel 15:23

I was told God forgives all sin and you know what “He does,” however not if the individual is returning to the very sinful nature just forgiven. You see there is a little clause at the end of the forgiveness, that goes like this. Go and sin no more. What comes to mind is Prov.26:11: As a dog returneth to his vomit, so a fool returneth to his folly.