Psalm 94:

In the multitude of my anxieties within me, your comforts delight my soul.In the New Testament, the Gospel of Matthew encourages:

And can any of you by worrying add a single hour to your span of life? ... So do not worry about tomorrow, for tomorrow will bring worries of its own. Today’s trouble is enough for today.The Greek word used for worry in Matthew is merimnaō, which means to be anxious about, or to be troubled with cares. St. Paul writes to the Philippian church, "There is no need to worry" and in the pastoral epistles, 2 Timothy 1:7 emboldens:

For God did not give us a spirit of cowardice, but rather a spirit of power and of love and of self-discipline.Similarly James 1:2-4 motivates to face trials of any kind with joy, because they produce endurance (strength and courage). Further Saint Peter reveals his understanding of healthy living in Second Peter 1:3,5–7:

We have a sure hope ... this is a cause of great joy for us.A late Indian spiritual teacher Meher Baba stated that worry is caused by desires and can be overcome through detachment:

Worry is the product of feverish imagination working under the stimulus of desires ... (It) is a necessary resultant of attachment to the past or to the anticipated future, and it always persists in some form or other until the mind is completely detached from everything.
Worry refers to the thoughts, images, emotions, and actions of a negative nature in a repetitive, uncontrollable manner that results from a proactive cognitive risk analysis made to avoid or solve anticipated potential threats and their potential consequences. Introduction
Psychologically, worry is part of
Perseverative Cognition (a collective term for continuous thinking about negative events in the past or in the future). As an emotion "worry" is experienced from anxiety or concern about a real or imagined issue, often personal issues such as health or finances, or external broader issues such as environmental pollution, social structure or technological change. It is a natural response to anticipated future problems. Excessive worry is a primary diagnostic feature of generalized anxiety disorder, but also is pervasive in other psychological disorders, like schizophrenia. Most people experience short-lived periods of worry in their lives without incident; indeed, a mild amount of worrying have positive effects, if it prompts people to take precautions (e.g., fastening their seat belt or buying insurance) or avoid risky behaviors (e.g., angering dangerous animals, or binge drinking), but with excessive worrisome people they overestimate future dangers in their assessments and in its extremities tend to magnify the situation as a dead end which results stress. Overestimation happens because analytic resources are a combination of external locus of control, personal experience and belief fallacies.