"The Lord is my light and my salvation — whom shall I fear? The Lord is the stronghold of my life—of whom shall I be afraid? When evil men advance against me to devour my flesh, when my enemies and my foes attack me, they will stumble and fall. Though an army besiege me, my heart will not fear; though war break out against me, even then will I be confident." Psalm 27:1-3
You were wired for faith not for fear.
Like faith, fear is a decision. You can choose to be afraid or you can choose to believe.
Here in this Psalm, David declares his decision to not give in to fear. That decision is based upon His knowledge that God is his light and his salvation. He chose to believe that a God who is able to do that for him is also able to deliver him from fear.
This does not mean that you may not have feelings of fear, but it does mean you do not have to give in to those feelings or act upon them. Rather, you speak faith to those fears just as David does in the first verse of this Psalm.
When he writes, "The Lord is my light and my salvation — whom shall I fear? The Lord is the stronghold of my life—of whom shall I be afraid?", who do you think he is addressing? He is refocusing his mind by focusing on his faith not his fears. AND he is speaking to his fear.
That decision is best made ahead of time rather than when you are under attack by a fierce enemy. In fact, every day you should remind yourself that God is your Light and your salvation. Rejoice in that truth. Reinforce it in your mind. Saturate you spirit with it. Such a daily confess of faith will remove your fear. Speak it aloud so you can hear yourself declare it. Acknowledge His presence and power in your life.
When the day of trouble comes and the enemy is breathing his threats, you will find that faith has become your default setting. You will be able to choose faith over fear.
You can choose to live in faith and not by fear.
You can declare your faith every day!