With the disappearance of God from our daily lives, a void has been created in the minds of many whom otherwise would have been receptive of believing in some type of Christianity. Not believing means you've excluded yourself from the flock, but humans unconsciously strive to be part of a group.
The Victorian Era is usually seen as one of secularisation, a period when the disciplines and institutions of modern science were founded. The traditional authority of religion made room for explanation through the scientific exposition of natural laws.
But, just as can be seen in our times, people found that their world was changing and progressing too fast. In lots of minds the advance of science could not keep up with the decline of belief. In that psychological void the belief in supernatural forces, mesmerism, spiritualism and 'true' ghost stories flourished. The natural and the supernatural often became blurred in popular thinking.
The Parasite' (1894) in which a female mesmerist subjugates a young male scientist in her home.
Nothing much has changed.