Why are people afraid? Some people say they are lost in their souls. Is it superstition?

This is superstition! Atheism can be well proved. There is no such thing as a ghost. Believe in science!

Many times, people are afraid because they often can't understand the reasons correctly, so they would rather believe in the illusory "superstition" and make a reasonable explanation for it.

Explained by the dominant "science", this is "superstition", or at most "psychological suggestion", but who can prove that the current "science" is really scientific?

What it can't explain is not necessarily superstition, because there are so many things it can't explain that it can't explain itself.