As we don't have the details of the 'friend indeed the bill sackter story', it's a bit of a guess. But generally in friendship stories, themes such as acceptance and forgiveness can be important. In the case of Bill Sackter's story, if he had a friend who truly understood him, acceptance of who he was would be a big part. And if there were any misunderstandings or mistakes along the way, forgiveness might also be a theme. Also, the idea of shared dreams or goals within a friendship could be present. Maybe Bill Sackter and his friend had a common goal that they worked towards together, which strengthened their bond.
Since I don't know the exact story, it's hard to say for sure. But common themes in stories about friendship could be loyalty, trust, and mutual support. Maybe in this 'bill sackter story', these are the main themes as well.
Well, not knowing the full story, it could be that themes of self - discovery and growth through friendship play a part. If Bill Sackter had a special friendship, perhaps they both learned things about themselves. Another possible theme could be the power of connection. That is, how a true friendship can change a person's life for the better, like in many friendship - based stories.