Worry implies that we don't quite trust that God is big enough, powerful enough, or loving enough to take care of what's happening in our lives.
Stress says that the things we are involved in are important enough to merit our impatience, our lack of grace toward others, or our tight grip of control.
Basically, these two behaviors communicate that it's okay to sin and not trust God because the stuff in my life is somehow exceptional. Both worry and stress reek of arrogance. They declare our tendency to forget that we've been forgiven, that our lives here are brief, that we are headed to a place where we won't be lonely, afraid, or hurt ever again, and that in the context of God's strength, our problems are small, indeed.
Why are we so quick to forget God? Who do we think we are? I find myself relearning this lesson often. Even though I glimpse God's holiness, I am still dumb enough to forget that life is all about God and not about me at all.
-From Crazy Love by Francis Chan (Pg. 42)