Both worry and stress reek of arrogance.
The stress that some of us feel - it's a lack of faith, it really is.
God exists outside of time, and since we are within time, there is no way we will ever totally grasp that concept.
What are you doing right now that requires faith?
It's much less demanding to think about God's will for your future than it is to ask Him what He wants you to do in the next ten minutes.
We need to stop giving people excuses not to believe in God.