Written in 1961 but useful for today:
The world is full of enemies, and as long as we are subject to the possibility of harm from these enemies, fear is inevitable. The effort to conquer fear without removing the causes is altogether futile. The heart is wiser than the apostles of tranquility. As long as we are in the hands of chance, as long as we must look for hope to the law of averages, as long as we must trust for survival to our ability to outthink or outmaneuver the enemy, we have every good reason to be afraid. And fear hath torment.
To know that love is of God and to enter into the secret place leaning upon the arm of the Beloved–this and only this can cast out fear. Let a man become convinced that nothing can harm him and instantly for him all fear goes out of the universe. The nervous reflex, the natural revulsion to physical pain may be felt sometimes, but the deep torment of fear is gone forever. God is love and God is sovereign. His love disposes Him to desire our everlasting welfare and His sovereignty enables Him to secure it. Nothing can hurt a good man.