This I can relate to. Fear is an emotion most of us have from time to time. The Lord does not want us to be afraid. He gives us the power and ability to carry out anything he asks of us. But that wasn't Elijah's only problem.
Depression can frequently come after fear.
After fear does its part to paralyze us, depression sets in and we dwell on our own resources, becoming depressed at our lack of ability to change the situation. Again, many men of the Bible became depressed. Paul got depressed - you can imagine why. But Paul did get depressed just as Elijah did. Depression is ultimately caused by satan and his cohorts, but always remember God has given us a sound mind.