Why is fear and worry so harmful to us?
The reason fear is so bad is because the information it gives the body can be real or imagined, but the body doesn't know the difference. The body does not know the difference between reality and unreality. It responds simply to what it is told. If the mind perceives that there is a monster in the closet, the body will respond with anxiety and panic. The mind has such power over the body that what the mind perceives as reality is communicated to the body and you physically feel the effects. Worry has the same effect on the body. It responds to what it is told. Fear produces stress that affects all parts of the body and can eventually put you in the grave. This is why Jesus was so emphatic about the believer living free from care and worry. The mind also has the ability to refuse to let stress and fear take up residence. This is done by making the decision to live in the promises of God. The reason the Word must be used is because fear cannot be simply displaced; it must be replaced with something bigger than itself.