The universe presents itself to sense and sense-perception as a perpetual genesis, "a vast aggregation and history of phenomena conditioned in time and space which, by its diversity and mutability, is disqualified from being regarded as independent and self-existent." To our experiential knowledge, to our physical science in its highest generalizations, the universe is a product, an effect. And it is an effect for which the reason demands an explanation and a cause. It is a manifoldness and diversity which the logical understanding is ceaselessly endeavoring to reduce to a unity. Indeed, every movement of thought, from the first rude attempt at classification on the simple basis of resemblance, upward to the recognition of more profound ideal relations and uniform laws, until its culmination in the highest integration of reason, is but the effort of the mind to grasp the individual facts of nature in a unity of thought, and interpret the universe according to principles and ideas which the reason supplies.

The moment reflective thought is directed to the phenomenal world, the questions spontaneously arise—Out of what does the phenomenal come? By what agency or efficiency does it arise? Why does it present itself in this order rather than another? Or, more specifically—What is the abiding reality which sustains the array of phenomena? What is the invisible power which effects all the changes we see around us? What is that unseen presence which determines the forms, relations, and adaptations which every where present themselves to the reason of man? In a word, What is that ultimate principle—the last or remotest in the order of analytic thought, the first in the order of being and of reason—which sustains and moves and organizes and governs all—that fundamental, abiding primus which is everlastingly present behind the scenery and changes of the world—that which always was, and now is, and ever shall be FIRST? Or if we permit ourselves to regard the present order of things as a necessary out-birth from the past, still we are compelled by a laborious effort of regressive thought to climb upward through a series of changes to an absolutely FIRST of the series conditioning all the other members, but itself unconditioned. Few will now claim that this is the natural and adequate cosmical conception; but, even under this mode of conception, we can not but feel that a development without a beginning of the process, a series without a first term, is impossible. "The absolute infinity of a series is a contradiction in adjecto. As every number, although immeasurably and inconceivably great, is impossible unless unity is given as its basis, so every series, being itself a number, is impossible unless a first term is given as its commencement." Therefore the question still returns—What is that First Principle of all things?

In obedience to this demand of reason, or impelled by an innate "wonder"—"the feeling of the philosopher"—men have in all ages attempted an ideal construction and rational interpretation of the universe.[11] The Mythologies, Cosmogonies, Philosophies, Religions of the ancient world were the simple products of this innate tendency. Beyond the circle of thought illuminated by Divine revelation, the first movement of reflection was unmethodical and incomplete. Pursuing the inquiries objectively, that is, in the realm of outward nature, and not subjectively in the realm of reason, the human mind was perpetually entangled with dualistic conceptions. There were contrarieties, polarities, antagonisms, which the logical understanding could not cancel. Hence we have, as an early, perhaps the earliest, form of construction, an Oriental Dualism—as in the Adonis and Moloch of the Phoenicians, the Isis and Osiris of the Egyptians, the Ormuzd and Ahriman of the Persians, the Chaos and Love of Orpheus, the Plenum and Vacuum (Matter and Space) of Democritus, and even some lingering taint in the God and Necessity of Plato's "Timæus."

But all this was unsatisfactory to human reason, which is a unity, and which makes its imperious demand that absolute unity shall stand at the fountain-head of being. It has never been able to rest in an Ultimate which was not an Absolute—that is, a unity which by its very idea and conception is the negation of all plurality and mutability; a unity which is unconditioned, and yet which conditions all; an "eternal constancy," the voluntary cause of all genesis and all change.[12] It is a law of reason, under which alone it can maintain its integrity, that the First Cause must be ONE, and not many. An absolute cause must be one in order to be absolute; two absolutes is a contradiction. With more or less clearness, men in all ages have apprehended that "the First Principle must be one or nothing."

This is tacitly conceded in all modern systems of thought. Büchner, the materialist; Spencer, the dynamist; Hegel, the idealist; Cousin and Coleridge, the spiritualists, know no divergence here. Atheism, Pantheism, and Theism alike commence with unity at the fountain-head of being—a unity which is incomposite, absolutely continuous, every where present and eternal. Every system of philosophy is essentially an effort to show how the universe that now is has been originated by, or evolved out of, or has emanated from, a First Principle, an absolute Unity. To determine whether this absolute First Principle can be known, and, if known, how conceived and expressed aright, is the ultimate problem of all philosophy and all religion.

All the answers which have been given, and, indeed, all which can be conceived, are contained in the following four propositions:

1. In the beginning was MATTER—matter as the original substance or substratum, with its inherent, essential, and necessary attribute of force; this alone is eternal and infinite. "No force without matter—no matter without force." "Matter and its immanent force is immortal and indestructible." "The world is unlimited and infinite."[13] Matter, with its primary forces of attraction and repulsion, cohesion and affinity, is fully adequate to the explanation of all the phenomena of the universe, physical, vital, and mental.

2. In the beginning was FORCE—force homogeneous but unstable, and necessarily tending to differentiation and heterogeneity; splitting into opposites, standing off into polarities, ramifying into attractions and repulsions, light, heat, magnetism, and electricity; and mounting up through the stages of physical, vital, and neural to the mental life itself, with all its varied and endless phenomena, as revealed in the languages, laws, institutions, arts, sciences, and religions of the world. Force is "the ultimate of all ultimates," the "Absolute Reality," the "Unconditioned Cause."[14]

3. In the beginning was THOUGHT—thought as an eternal process of self-manifestation and self-actualization, which in its necessary evolution reveals itself as force, and expresses itself in the varied types of existence and laws of phenomena, natural and spiritual. "The Absolute Idea," as a perpetual process, an eternal thinking, is the supreme principle of all reality. "The idea of the Absolute Spirit comprehends the entire wealth of the natural and the spiritual world; it is the only substance and truth of this wealth, and nothing is true and real except so far as it forms an element of its being."[15]

4. In the beginning was WILL—an unconditioned Will as the indivisible unity and perpetual differentiation of Reason and Power and Love. This Unconditioned Will is the causative principle of all Reality, all Efficiency, and all Perfection—a causative principle containing, predetermining, and producing all the manifold forms and relations, forces and laws of the universe in reference to a final purpose. This Absolute First Cause is a living personal Being, "from whom, in whom, and to whom are all things."[16]