The root of fear is unbelief
John 14:27 Peace I leave with you; My [perfect] peace I give to you; not as the world gives do I give to you. Do not let your heart be troubled, nor let it be afraid. [Let My perfect peace calm you in every circumstance and give you courage and strength for every challenge.]
2 Timothy 1:7 For God has not given us a spirit of fear, but of power and of love and of a sound mind.
John 8:12 Once more Jesus addressed the crowd. He said, “I am the Light of the world. He who follows Me will not walk in the darkness, but will have the Light of life.”
Philippians 4:8 Finally, believers, whatever is true, whatever is honorable and worthy of respect, whatever is right and confirmed by God’s word, whatever is pure and wholesome, whatever is lovely and brings peace, whatever is admirable and of good repute; if there is any excellence, if there is anything worthy of praise, think continually on these things [center your mind on them, and implant them in your heart].
Romans 12:2 do not be conformed to this world, but be transformed by the renewing of your mind, that you may prove what is that good and acceptable and perfect will of God.
I John 4:18 (AMP) There is no fear in love [dread does not exist], but full-grown (complete, perfect) love turns fear out of doors and expels every trace of terror! For fear brings with it the thought of punishment, and [so] he who is afraid has not reached the full maturity of love [is not yet grown into love’s complete perfection].
Faith does not cast out fear LOVE does!