Apples and pears can be weighed and measured, but God cannot.
You can point at an apple and say: "There is an apple there on the table." But you cannot point at God and say, "God is sitting there on the park bench."
The soul, the self, and ugly are also words that denote something that cannot be weighed, measured, or pointed out.
If gods, angels, and ghosts exist, they must be made of something. They may not be made of electrons, protons, and neutrons. They may be made of something else, much like dark matter and dark energy.
This way of thinking is called dualism.
The opposite of dualism is monism, or materialism, which holds that only one substance exists: matter.
Dark matter is the invisible glue that holds the universe together. This mysterious material is all around us, making up most of the matter in the universe. But what exactly is dark matter? That's a question that scientists have been trying to solve for almost 100 years.
Dark matter makes up most of the mass in galaxies and galaxy clusters. In fact, scientists estimate that ordinary matter makes up only about 5% of the universe, while dark matter makes up about 27%. (The rest is thought to be dark energy, which is its own mystery). It's thought that dark matter shapes the cosmos, organizing galaxies and cosmic objects on a large scale.
https://science.nasa.gov/dark-matter/
Moreover, there may also be dark, mysterious fields that aren't electromagnetic, which convey telepathic and synchronistic waves. Who knows?
A policeman sees a drunk man searching for something under a streetlight and asks what the drunk has lost. He says he lost his keys and they both look under the streetlight together. After a few minutes the policeman asks if he is sure he lost them here, and the drunk replies, no, and that he probably lost them in the park. The policeman asks why he is searching here, and the drunk replies, "this is where the light is" https://en.wikipedia.org/wiki/Streetlight_effect
This is similar to what scientists do. They search where the light is. They are only interested in what can be measured. Religious and spiritual people are searching in the dark.