“It is possible that the evolution of the given apparatus called man, in the unknown abyss of the prehistoric times of its development, did not know the world and had not seen its manifestations, but felt a contact with some manifestation or other. And that all the functions which now comprise the sensible apparatus – the results of subsequent evolutions with the definite inclination of the psychical phenomenon which strives to know or reveal the authentic of the phenomena touching it. The contacts, let us say the material particles, have excited the given and from that excitation some action or other came about, without in any way deciding beforehand whether the given movements were authentic. It is also possible that because of such reciprocal contacts some action or other was produced as a process of the psychical representation of all phenomena in their determination by authentic facts. The movement of light particles has perhaps given birth to areas in the body which started to perceive or accumulate light, and which formed the ball of the eye.”