..the movement of fear which is expressed by the eyes fluttering is not a mental or a vital fear: it is a fear in the cells of the body; for it has not been impressed upon them that there is no danger and they do not know how to resist. It is because one has not done yoga, you see. With yoga one can watch with open eyes, one would not close them; but one would not close them because one calls upon something else, and that “something else” is the sense of the divine Presence in oneself which is stronger than everything.
Ref: Questions and Answers 1950 – 1951