Fear is not a feeling, but a spirit, and that spirit is not from God. -2 Timothy 1:7 As Christians, whenever we find a spirit that is not of God around us, we must banish such a spirit immediately.
The spirit of fear creeps into a man's life through imaginations -2 Corinthians 10:5 The knowledge of Christ casts down fearful thoughts and imaginations.
The more of God you know, and the more aware you are of His power and love for you, the less afraid you will be. When the thoughts come, respond with the word of God that counters them.
“You cannot know God without studying His word, hence, to truly banish fear from your life, you need to study God's word consistently, and meditate on it every day. -Romans 10:17”
Memorise: Fear thou not; for I am with thee: be not dismayed; for I am thy God: I will strengthen thee; yea, I will help thee; yea, I will uphold thee with the right hand of my righteousness. -Isaiah 41:10