When danger occupies your mind, it may starts making you fear. However, God said do not fear at all no matter how the enemy encompasses but feel God’s existence with you and this casts away every fear.
Only those who do not feel God's existence in their lives may fear or those whose sins separate them from God and consequently are deprived of help and protecting power.
But what does the bible says? The bible tells us in the book of Genesis;
After these things the word of the Lord came unto Abram in a vision, saying, Fear not, Abram: I am thy shield, and thy exceeding great reward.
Gen.15:1
God said to Paul the Apostle;
Do not be afraid, but speak, and do not keep silent: For I am with you, and no one will attack you to hurt you...
Acts 18:9,10
He said to his disciples;
Do not fear those who kill the body...
Matt. 10:28
Similarly said to Joshua
Be strong and of good courage; do not be afraid, nor be dismayed, for the Lord your God is with you wherever you go, No man shall be able to stand before you all the days of your life
Josh. 1:9,5
Therefore, God Always says to you fear Not ”. He who keeps you will not slumber.. neither slumber nor sleep... The Lord shall preserve you from all evil: He shall preserve thy soul. The Lord shall preserve your going out and your coming in... " (Ps. 121).