The average man may regard this sensibility on the question of birth as preposterous and hardly credible; but with the utmost respect for his knowledge as the rock from which all other knowledge is hewn, it must be admitted that many well-proved facts are dark to the average man, even concerning the action of his own heart and the structure of his own retina. A century ago he and all his forefathers had not had the slightest notion of that electric discharge by means of which they had all wagged their tongues mistakenly; any more than they were awake to the secluded anguish of exceptional sensitiveness into which many a carelessly-begotten child of man is born.

The average man may regard this sensitivity on the question of birth as preposterous; but the average man does not even understand the action of his own heart and the structure of his own retina, let alone his mind.
