Fear is a phenomenon of unconsciousness. It is a kind of anguish that comes from ignorance. One does not know the nature of a certain thing, does not know its effect or what will happen, does not know the consequences of one’s acts, one does not know so many things; and this ignorance brings fear. One fears what one does not know. Take a child, if it is brought before someone it does not know (I am not speaking of a child with an awakened inner consciousness, I am speaking of an ordinary child),—you bring it before someone it does not know, its first movement will always be one of fear. Only very rare children—and they have another consciousness—are very bold. It may also be a mixture of apprehension, a kind of instinct. When one instinctively feels that something is dangerous and hasn’t the means to remedy it, when one does not know what to do to protect himself from it, then he is afraid. There are, I believe, countless reasons for fear. But it is a movement of unconsciousness, in every case.
That which knows has no fear. That which is perfectly awake, which is fully conscious and which knows, has no fear. It is always something dark that is afraid.
Ref : Questions and Answers 1954