Respuesta :

This quote means that you shouldn’t be afraid of anything or anyone, except what is in your own mind. Your mind has the power to completely drive yourself crazy. In experiments where someone is locked in a soundproof, pitch-black room, they start hearing voices and seeing things that aren’t there.
I think It means that the only thing you’re afraid of is knowing that the emotion fear is something that you can feel and that scares. We are anticipating the fear so there for it is the only thing to be afraid of If that makes sense