I apologize to the moderators for the double post, I realized now that they were posted in Italian and not in English.
It should be remembered that the Bible is not basically a Christian book, but rather a collection of grimoires, some centered on history and others on magical practice.
Written in different eras and by different people, these books contain a magical knowledge that precedes the very creation of the modern Bible, even more distant from Christianity.
So yes, I think a lot of what we find can be used.
As proof of this, in fact, we find many uses of the psalms in occult practices, or the use of "divine" names or words of power.
The problem today lies in the fact that the Bible has been totally contaminated by the Church, which has transformed or reconstructed many key passages in a Catholic key. This is my thinking about the Old Testament, because for the New Testament it is a whole other story.
However, as with any other book, whether it is considered sacred or not, much depends on how the magician sees it, that is, on what kind of energy he attributes to it.
And the book responds to that kind of energy. I hope I have explained myself despite the translator