is said to be the most common, yet its groundless character is proved by the insignificant percentage of deaths caused by lightning. Fear of darkness is the standing misery of childhood, especially of imaginative and delicately organized child-hood. A well-known novelist describes the sufferings from this cause of her hero's boyhood. "Every night brought its own distinct horror. The black dormitory was full of murderous visions that he dared not look upon. Only the blanket lay between him and the wolves, the blood-stained daggers held by a severed hand in the air, the bat-like. old women measuring drops of poison into a cup. Awful indeed is the war of a child with darkness, when imagination is at its height, and reason is scarcely born in him. Even now,worry. Shelley envies the skylark his power of giving himself up to the joy of the moment and contrasts therewith his own faculty of sorrow:

"We look before and after
And pine for what is not,
And our sincerest laughter
With some pain is fraught."

This power to look before and after is the expression of man's self-consciousness of his ability to identify himself under , all the changes of the past, present, and future. As a man rises in the scale of personality, he is the more prone to live in the past and in the future; to be content with the present alone is the mark of the animal mind. Thus worry is the shadow cast by man's moral and intellectual greatness and, as Pascal says, "the grandeur of man is