The murderer in America may flee to England or France, but through conscious memory he is, and will forever be, compelled to keep company with the murderous villain. He has this consciousness and will keep it through eternity, even though he should be pardoned. Here, then, is certain knowledge, more than seeing, hearing, or any other sense belonging to the physical, for it is the conscious knowledge of that which sees and hears, and which reaches out through the senses and connects itself with the objective. It is therefore certain that, in case there is no such thing as mental science, there is no such thing as science at all, in all the realm of the universe; because the mind, in the act of knowing, knows itself or is conscious of its own operations, otherwise it could know nothing whatever, could not be mind.
Have we not the most certain evidence of the existence of mind? Is light a certain evidence that there is light, or a source of light? Is not reasoning a proof that there is something which reasons? Can there be light without a cause? Can there be invention without an inventive being? The mind is like a telescope in this respect, that it shows itself in showing that about which it is occupied. The man who is content to believe what he sees, hears, tastes, smells and feels, is only a sensuous believer--an animal, and not a man. Reason's glory is that it perceives the invisible.
There are conditions under which circumstantial evidence is the best possible testimony. These conditions are found inseparably connected with our present subject. That men now possess the same powers of body and mind that they always manifested is disputed by no intelligent individual. Those powers have been, through all the ages, precisely the same both in number and kind. Has the history of humanity furnished a single case in which a person, perfectly deaf during all his life, had the ability to speak words? Such is unknown in the history of the past, and also in the records of the present. History is as blank at this point, as a barren oasis. All the other faculties are as perfect with the deaf as they are with those whose hearing is perfect. Their inventive genius is equally vigorous; this being true, why should the defect of the ear deprive them of the power of speech? Will the Deist answer this question? Mr. Skeptic, as you are in the same difficulty with the Deist, you may help him if you choose. If you are, as you pretend, free and fearless thinkers, give us your thoughts upon this question. If you are cowardly, then stand off and sneer at the question which you dare not try to answer. The facts developed at this point ought to be remembered, and the question, why can the deaf, described, never talk? ought to be pressed home to every heart.