Fear is an interesting emotion and can come in various states. Fear can be a good thing because it warns you of danger and your body responds to it by releasing adrenaline throughout your body. This can give you the fight or flight response. Fear can also prevent you from doing stupid things eg you may see a violent 6ft 5 inch drunkard shouting abuse and full of muscle. Most people would fear that person, so they would avoid him. If someone didn't fear him, they would be exposing themselves to danger. Plus there is the fear which actually helps you to respect a particular person eg fear God. Fearing God doesn't mean be afraid or dread God, it means to have an intense respect for Him and realise that He has the power of life or death. There are so many types of fear. Funny enough, they all feel different eg the fear of an insect like a cockroach. This fear makes you feel disgusted and makes you want to kill it whlist avoiding touching it. Yet the fear in a nightmare feels different yet again. The fear in a nightmare feels monstrous, which is a sour yet very deeply disturbing feeling. The fear of a violent person feels different yet again. It is more of a disturbing, anxious feeling which you feel in the pit of your stomach.
