Quite a stretch equating Catholicism with occultism. They being sworn enemies and all. And Jesus saying the truth loves the light, while evil hides in darkness.
Not Catholics, the Institution.
The Church has sought knowledge that isn’t in the Bible to support their positions.
Unless you are going to argue that Pope Francis is supporting positions that are Biblical, then you have to understand that he and his Cardinals and Bishops are making use of knowledge that isn’t Biblical and they got this knowledge from somewhere.