Two things,
First, the most dangerous thing in the world is a closed mind. Secondly, Certainty is an illusion, for there is no certainty in the flesh, never was, never will be. These two facts are the bookends of fear.
We close our minds because we crave certainty, but it is a fool’s quest. Better to learn how to press on despite our fears. For if we give into fear, and close our own minds, be become the very thing that we fear.
In my faith tradition, we call this walking by faith. And dare I say that if I am never uncomfortable, then surely there is a question of whether I am truly exercising my Faith.