The other emotional response that undermines our love for God
Perfect love drives our fear - 1 John 4:18
Fear greatly affects our ability to love; renders lifeless our love for God
Fear one of the most powerful and universal tools Satan uses for:
There is healthy fear (like fearing God) but unhealthy fear is one that controls us and causes us to turn away from God's direction
Fear is rarely rational
God understands the destructive nature of fear
He simply commands us to deal with our fears through our relationship with him