Page "Osiris" Paragraph 13

The Nile, supplying water, and Osiris ( strongly connected to the vegetation ) who died only to be resurrected, represented continuity and stability.

As Banebdjed, Osiris was given epithets such as Lord of the Sky and Life of the ( sun god ) Ra, since Ra, when he had become identified with Atum, was considered Osiris ' ancestor, from whom his regal authority is inherited.

Ba does not mean " soul " in the western sense, and has to do with power, reputation, force of character, especially in the case of a god.