Isaiah is commanded not to 'fear what they fear.' What does it mean to share in the fear of others, and what's the alternative God offers?
The people of Judah were gripped by terror because of the impending invasion by Syria and Israel. This fear led them to seek dangerous political solutions, like an alliance with Assyria. God instructs Isaiah and his followers not to adopt this same paralyzing fear.
This doesn't mean ignoring danger, but rather redirecting the object of their ultimate concern. The fear that grips the world is a fear of human power, political instability, and ultimate destruction. The fear God desires is a 'fear of the Lord' – a deep reverence and awe that acknowledges His sovereignty over all human affairs. When you fear God, you understand that no earthly power can truly harm you apart from His allowance, and that He is your ultimate refuge.