Well, "Christian," not necessarily Christian. The Waite Majors, with the exception of the Lovers, follow the Golden Dawn ones, that reflected its initiatory system of beliefs. It isn't necessarily Jesus's Christianity; they "neutralized" the context and kept the birth, death and resurrection formula of Osiris (the magical formula of IAO). The Pope was stripped of his temporal power and was "restored" to his original function as initiator into the Mysteries. Although the Hierophant retains some his authoritative connotations the High Priestess is, in a way, a "new" card that is quite different from the ideas associated with the Papess. It is, in a way, also restored to the original ideas of the Isian figure, in itself rife with sexual undertones.