Taken from Intouch.org (Intouch Ministries, Inc.)
Throughout scripture, the Lord gives us evidence that many people deal with anxiety—even those considered pillars of faith. For example, we can deduce that the apostle Paul must have felt fear, since God instructed Him not to be afraid “any longer” (Acts 18:9).
The fact that fear is common, however, does not mean it is from the Lord (2 Timothy 1:7). Of course, certain situations—like hearing a loud noise when we are alone—will trigger a frightened response. But God doesn’t want us to live with ongoing anxiety.
Common worries include the fear of death, poverty, illness, old age, criticism, and the loss of a loved one or something cherished. Why do we find it so hard to let go of our concerns, even when God clearly states, “Do not fear” (Luke 12:7)? The reason is that worry can become deeply ingrained in the way we think. Sometimes we have unhealthy thought patterns that stem from feelings of inadequacy, a sense of guilt, or a mistaken view of the Lord. It’s not uncommon for insecurity in childhood to develop into a lack of confidence later on. Life experiences can be another factor. For instance, a person who has lost a parent suddenly in a car accident is likely to struggle with worry.
Regardless of the cause, anxiety will take our eyes off our omnipotent, loving heavenly Father and focus our attention on our circumstances. No wonder God repeatedly reminds us not to fear—He wants His children to feel secure in His capability and trustworthiness.
Bible in One Year: 2 Chronicles 33-36