Fear makes a person always complain, and makes the person have doubts about the love of God and His care. For this reason we often find that fear is responsible for the person remaining inactive and not contributing positively in life.
Fear paralyzes the person, making him incapable of advancing forward. Fear makes the person think that they will not be able to fulfill their dreams and wishes, and it makes the person remain silent, and not say the truth.
—H.E. Metropolitan Youssef, How to Overcome Fear, The Effect of Fear on the Human Being