The Bible is a historical novel, reporting on myths, folktales and events by storytellers and taken as such by millions of believers through the centuries.
Personally I don't see how Faith itself can be a virtue or a vice anymore than running or jogging or eating can be considered virtues or vices. It is the validity of a given belief and the behavior of individuals in a given situation that determine whether it is virtue or vice. For example the Faith of Christians during the 60's-80's that lead to the White Flight from the cities and the creation of the thousands of Avoidance Schools would be considered a vice IMHO. Todays Christian Faith that leads folk towards Biblical Creationism or YEC is a vice and ultimately a disservice to all the kids it will effect. The Faith that lets Christians support oppressing other folk just because they happen to be homosexual is no different than the Faith that led to expelling the Jews from Europe, burning witches or the Inquisition.
On the other hand the Faith that the universe is orderly and understandable, that GOD is not a liar or trickster as portrayed by Fundamentalist Christians is IMHO a virtue. The Faith that we will be able to one day cure many of the remaining deseases and defects that plague mankind is a virtue. The Faith that led artists to create wonders like the Great Cathedrals , that inspires acts of sacrifice or kindness is a virtue.
Faith is neither vice or virtue. What is done can be either.
Aslan is not a Tame Lion