Some fears are legitimate, of course; we should fear a poisonous snake or a drunk driver, and take steps to avoid them. We also should fear sins that have a grip on our lives, because we know they’ll destroy us. The Bible says to “flee from all this, and pursue righteousness, godliness, faith, love, endurance and gentleness” (1 Timothy 6:11). But some fears aren’t legitimate — that is, they have no basis in fact.
The key is to learn to trust God, no matter what our fears are. And we can trust Him, because He loves us, and He is greater than anything we’ll ever face. Furthermore, when we know Christ, we know He is with us every moment of the day, and that should give us comfort.