My take is that fear arises when something or someone i.e. God, is out of our control and is recognised as having an influencing power on us... beyond our will or choice. Although I would like to say I respect God, rather than fear God
What I find becomes a little silly is if I fear God because God is more powerful than me and out of my control, why bother fearing God, why not just love Her/Him and accept all that comes to you?
I think fear is just a tool, a way to make you realise God instead of thinking everything that happens in life is down to you and me.... rather God is there too!