Ask yourself, does this thought come from God or Satan? If it comes from Satan, then you need to pray and ask God to remove this thought and replace it with His truths. Seek His word and learn what He says in scripture. Hold that thought captive and slay that thought and replace it with God's. Rejoice and praise God for the truth that He is replacing in your life. Slowly, you will see just how each thought, especially thoughts that seem to be on repeat can cause depression, anxiety, and fear!