ANXIETY
(see also WORRY)

Q. What lies at the bottom of the ocean and twitches?
A. A nervous wreck.   

Health, Canada.

The beginning of anxiety is the end of faith, and the beginning of true faith is the end of anxiety. 

George Muller.

Anxiety is a thin stream of fear trickling through the mind. If encouraged, it cuts a channel into which all others thoughts are drained. 

Arthur Somers Roche.

OTHER

An average person's anxiety is focused on :

40% -- things that will never happen
30% -- things about the past that can't be changed
12% -- things about criticism by others, mostly untrue
10% -- about health, which gets worse with stress
8% -- about real problems that will be faced