Neither fret nor worry.

"Do not fret.

And who of you by being worried can add a single hour to his life?

For this reason I say to you, do not be worried about your life, as to what you will eat or what you will drink; nor for you body, as to what you will put on.  Is not life more than food, and the body more than clothing?

But seek first His kingdom and His righteousness, and all these things will be added to you.  So do not worry about tomorrow; for tomorrow will care for itself.

For nothing will be impossible with God."

-an interpretation taken largely from Matthew 6 in the NASB.