What force draws the needle round to the north? What force moves the muscle that raises the arm, when the will determines it shall rise? Whence comes the will itself? Is it spontaneous—a first cause, or an effect? These too are miracles; inexplicable as the creation, or the existence and self-existence of God.

Who will explain to us the passion, the peevishness, the anger, the memory, and affections of the small canary-wren? the consciousness of identity and the dreams of the dog? the reasoning powers of the elephant? the wondrous instincts, passions, government, and civil policy, and modes of communication of ideas of the ant and bee?

Who has yet made us to understand, with all his learned words, how heat comes to us from the Sun, and light from the remote Stars, setting out upon its journey earth-ward from some, at the time the Chaldeans commenced to build the Tower of Babel? Or how the image of an external object comes to and fixes itself upon the retina of the eye; and when there, how that mere empty, unsubstantial image becomes transmuted into the wondrous thing that we call SIGHT? Or how the waves of the atmosphere striking upon the tympanum of the ear—those thin, invisible waves—produce the equally wondrous phenomenon of HEARING, and become the roar of the tornado, the crash of the thunder, the mighty voice of the ocean, the chirping of the cricket, the delicate sweet notes and exquisite trills and variations of the wren and mocking-bird, or the magic melody of the instrument of Paganini?

Our senses are mysteries to us, and we are mysteries to ourselves. Philosophy has taught us nothing as to the nature of our sensations, our perceptions, our cognizances, the origin of our thoughts and ideas, but words. By no effort or degree of reflection, never so long continued, can man become conscious of a personal identity in himself, separate and distinct from his body and his brain. We torture ourselves in the effort to gain an idea of ourselves, and weary with the exertion. Who has yet made us understand how, from the contact with a foreign body, the image in the eye, the wave of air impinging on the ear, particular particles entering the nostrils, and coining in contact with the palate, come sensations in the nerves, and from that, perception in the mind, of the animal or the man?

What do we know of Substance? Men even doubt yet whether it exists. Philosophers tell us that our senses make known to us only the attributes of substance, extension, hardness, color, and the like; but not the thing itself that is extended, solid, black or white; as we know the attributes of the Soul, its thoughts and its perceptions, and not the Soul itself which perceives and thinks.

What a wondrous mystery is there in heat and light, existing, we know not how, within certain limits, narrow in comparison with infinity, beyond which on every side stretch out infinite space and the blackness of unimaginable darkness, and the intensity of inconceivable cold! Think only of the mighty Power required to maintain warmth and light in the central point of such an infinity, to whose darkness that of Midnight, to whose cold that of the last Arctic Island is nothing. And yet GOD is everywhere.

And what a mystery are the effects of heat and cold upon the wondrous fluid that we call water! What a mystery lies hidden in every flake of snow and in every crystal of ice, and in their final transformation into the invisible vapor that rises from the ocean or the land, and floats above the summits of the mountains!

What a multitude of wonders, indeed, has chemistry unveiled to our eyes! Think only that if some single law enacted by God were at once repealed, that of attraction or affinity or cohesion, for example, the whole material world, with its solid granite and adamant, its veins of gold and silver, its trap and porphyry, its huge beds of coal, our own frames and the very ribs and bones of this apparently indestructible earth, would instantaneously dissolve, with all Suns and Stars and Worlds throughout all the Universe of God, into a thin invisible vapor of infinitely minute particles or atoms, diffused throughout infinite space; and with them light and heat would disappear; unless the Deity Himself be, as the Ancient Persians thought, the Eternal Light and the Immortal Fire.

The mysteries of the Great Universe of God! How can we with our limited mental vision expect to grasp and comprehend them! Infinite SPACE, stretching out from us every way, without limit: infinite TIME, without beginning or end; and WE, HERE, and NOW, in the centre of each! An infinity of suns, the nearest of which only diminish in size, viewed with the most powerful telescope: each with its retinue of worlds; infinite numbers of such suns, so remote from us that their light would not reach us, journeying during an infinity of time, while the light that has reached us, from some that we seem to see, has been upon its journey for fifty centuries: our world spinning upon its axis, and rushing ever in its circuit round the sun; and it, the sun, and all our system revolving round some great central point; and that, and suns, stars, and worlds evermore flashing onward with incredible rapidity through illimitable space: and then, in every drop of water that we drink, in every morsel of much of our food, in the air, in the earth, in the sea, incredible multitudes of living creatures, invisible to the naked eye, of a minuteness beyond belief, yet organized, living, feeding, perhaps with consciousness of identity, and memory and instinct.

Such are some of the mysteries of the great Universe of God. And yet we, whose life and that of the world on which we live form but a point in the centre of infinite Time: we, who nourish animalculæ within, and on whom vegetables grow without, would fain learn how God created this Universe, would understand His Powers, His Attributes, His Emanations, His Mode of Existence and of Action; would fain know the plan according to which all events proceed, that plan profound as God Himself; would know the laws by which He controls His Universe; would fain see and talk to Him face to face, as man talks to man: and we try not to believe, because we do not understand.