Fear is relative. I can choose to be afraid of things that are not actually a threat. I am responsible for much of my own worry and anxiety.
However, when I choose to worry about something that is an even greater threat, I become less concerned with what I once feared. Over time, I learn to fear new things and each time the fear is from a greater threat.
I must eventually get to a point where my choice is to fear God or fear man and the things associated with a fallen world. My fear of God is a measure of my belief in him.
So, to fear God is to have hope. To fear there is no God, is to live in bondage.