When we focus on eternity and the promise of heaven the fear in our short lives loses its power over us.
You have an enemy who has spent your ENTIRE lifetime lying to You. Promising you things that he won't deliver, scaring you with things that don't exist. Learn to shut him up.
Even if we're on board with the idea that God is capable of overcoming our fears and limitations, actually trusting him is a big leap. After all, isn't God looking to punish me?
The only way to get from one mountain top to the other is to go through the valley. The shepherd doesn't leave us in the valley, but he leads us through it.