That the organs of the senses communicate with the mind, through the mediation of certain mysterious filaments, or thread-like bodies, termed nerves, cannot be denied; but the manner in which this communication takes place, the process by which mind receives information from matter, and the subtle operations which enable matter to transfer impressions to mind, are points around which, as it appears to us, the great Author of our being has thrown an impenetrable veil. It is true, that, in consequence of certain discoveries relative to what the older writers termed "the nervous fluid," discoveries which almost go to prove that the "fluid" is of an electric or electro-magnetic nature, a bold theory has been promulgated, namely, that these electro-magnetic currents not only give an impress to the mind or soul, but are in turn influenced by the agency of the immaterial principle, and that thus the communication between mind and matter is carried on; in fact, that the link which unites body to mind is a mysterious agent, which (its name is of little importance) cannot be recognised as belonging to the material world. Where revelation leaves a subject untouched, it is, we humbly think, allowable to theorize from facts which science has laid open; but let us remember that, however we may incline to a theory which seems consonant to science, a knowledge of the limitation of our intellectual powers should lead us to cultivate a spirit of humility and candour. It is something to approximate towards truth; let us, then, be content to leave much for a future revelation which science on this earth can never unfold before us.