Isaiah 41:10

Do not fear (anything), for I am with you; do not be afraid, for I am your God. I will strengthen you, be assured I will help you; I will certainly take hold of you with My righteous right hand (a hand of justice, of power, of victory, of salvation).

Faith takes courage, and fear is not believing that the Word of God is true. We are not to fear anything and leave an opening for sin to enter. To activate our faith, we must think and speak faith words. We actively produce faith and lead our hearts out of worry when we speak our faith.