Are there ghosts in the world? How can I see it?

There are no ghosts in the world, as far as the scientific progress of materialistic world outlook is concerned. Ghosts, to put it bluntly, are divorced from the' consciousness' of physical existence, but consciousness is produced through chemical reactions and the transmission of electrical signals in the brain hundreds of millions or even trillions of times per second. If there is no brain, where does' consciousness' come from? To say the least, even if we are conscious: can our usual consciousness be seen? Can you touch it? Will it affect others? Even our living consciousness can't affect others, let alone your so-called' ghost'? This is the truth that materialism comes first. Ghosts are just things people use to scare people.