Philippians 4:8
“Finally, brothers and sisters, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.”

Counter negative, fearful thoughts with ideas, concepts, memories that are pure, noble, and lovely. Do not be surprised or discouraged if you have to do this over and over throughout the day.

The Holy Spirit always wants to help us think again.