Page:Divine Selection or The Survival of the Useful.djvu/90

 material organism and the mind, or soul, in which is all faculty, and which uses the external organ as its instrument of action, we can proceed still further.

We are told that the hair sac is developed into an eye by the impact of light rays, or into an ear by the impact of sound waves. We have noted the unsatisfactoriness of this as an explanation of either, because we know that in light or in sound waves there is no adequate power of design. The senses of seeing and of hearing not being in ether or air, ether and air have no power to form these organs, much less are they able to impart the faculties of seeing and of hearing.

The essential faculty of seeing proper to the soul not only sees through, but forms the organ of sight in the body. That light did not form the eye ought to be evident from the fact that the eye is now formed before the animal comes to the light. If it needed the