Wel, tell her that if she doesn't hurry up and speak up for what she believes on, the world is going to move on without her, science is going to have its way, and she's going to be looked on as an antique curiousity, a museum fanatic.
Sadly, as science moves on and becomes increasingly specialised, sophisticated and incomprehensible to lay-persons, religion and supernaturalism are increasing to fill the gaps left in people's mindscapes by theories and information that have exceeded their cognitive abilities and education. Religious fanaticism is most definately not a receeding phenomena; it just went through a temporary recession while science was powerful enough to explain, at least in principle, most known (at the time) phenomena, but simple enough to be understandable almost in it's entirety by a moderately well educated person of average intellect.
Nowadays, unless a topic happens to be their field of specialisation, even the brightest and most educated are forced to take on faith, and the assurances of the specialists, the more esoteric of theories. How many people are capable even in principle of understanding string theory at the mathematical level? Even fairly simple concepts such as mechanisms of gene-mutation ellude a majority of the population.
