Fear is: an unpleasant emotion caused by the belief that someone or something is dangerous, likely to cause pain, or a threat.
be afraid of (someone or something) as likely to be dangerous, painful, or threatening.
I think that it means a person with lack of knowledge of something will have a fear of it. People will have a fear of the things that they do not understand. So try to understand something that you have a fear of.
What do you think it means?