“Concern” means to “have an interest in, give attention to, be engaged by a situation, as a matter of consideration or responsibility.” “Worry” is a disquieted uneasiness of mind, an anxious apprehension concerning an impending or anticipated situation; fretting about a foreboding misfortune or failure (“worried” and “anxious” are used as synonyms)… “Concern” becomes “worry” when we fail to relate the situation that confronts us to the source of sufficiency in God.
James Fowler