It is true that all things, including our understanding, may be improved. Everything develops, why should not our intellects do so? At the same time we may know a priori that our intellect must remain limited, of course not limited in the sense of the dunce, just as our eyes will never become so sharp that they can see through metal blocks. Every individual has its limited brain, but humanity, so the positive achievements of philosophy have shown, has an intellect of as universal a power as any that can be imagined, required, or found, in heaven or on earth.
We maintain that philosophy so far has acquired something positive, has left us a legacy, and that this consists in a clear revelation of the method of using our intellect in order to produce excellent pictures of nature and its phenomena.
For the purpose of making the reader familiar with this method, with this legacy of philosophy, we must enter more closely into the essence of the instrument which lifts all the treasures of science. We are especially interested in the question, whether it is a finite or infinite and universal instrument with which we go fishing for truth. It is the custom to belittle the faculties of the human understanding, in order to keep it under the supremacy of the divine metaphysical augurs. It is quite easy to see, therefore, that the question of the essence of our powers of understanding is intimately related to, or even identical with, the question of how we may be permitted to use them, whether they should be used only for the investigation of the limited, finite, or also for the study of the eternal, infinite, and immeasurable.
We object here to the tendency of belittling the human mind. About a hundred years ago, the philosopher Kant found it appropriate to draw the sword against those who played fast and loose with the human mind, against the socalled metaphysicians. They had made a miraculous thing of the instrument of thought, a matter for effusions. In order to be able clearly to state the outcome of philosophy, we must acquaint the reader with the fact that this instrument of thought, in its way, is one of the best and most magnificent things in existence, but that, at the same time, it is bound to its general kind or genus. The human understanding perceives quite perfectly, but we must not have an exaggerated idea of its perfection, any more than we would of a perfect eye or ear, that, be they ever so perfect, cannot see the grass grow or hear the fleas cough.
God is a spirit, says the bible, and God is infinite. If he is a spirit, an intellect, such as man, then it would be fair to assume that man's intellect is also infinite, or even is the divine spirit itself which has taken up its abode in the human brains. People cudgeled their brains with such confused conceptions, so long as the object of modern philosophy, the intellect, was a mystery. Now it is recognized as a finite, natural phenomenon, an energy or a force which is not the infinite, though it is, like all other matter and force, a part of the infinite, eternal, immeasurable.
Leaving all religious notions aside, the infinite, immeasurable, eternal, is not personal, but objective; it is no longer referred to as a masculine, but as a neuter. It may be called by many names, such as the universe, the cosmos, or the world. In order to understand clearly that the spirit which we have in our minds, is a finite part of the world, we must get a little better acquainted with this infinite, eternal world. Our physical world cannot have any other world beside it, because it is the universe. Within the universe there are many worlds, which all of them make out the cosmos, which has neither a beginning nor an end in time and space. The cosmos reaches across all time and space, "in heaven and on earth, and everywhere."
But how do I know what I state in such an offhand manner? Well, the knowledge of the universe, of the infinite, is given to us partly by birth and partly by experience. This knowledge is inherent in man just as language is, viz., in the germ, and experience gives us a proof of the infinite in a negative way, for we never learn the beginning or the end of anything. On the contrary, experience has shown us positively that all socalled beginnings and ends are only interconnections of the infinite, immeasurable, inexhaustible, and unfathomable universe. Compared to the wealth of the cosmos the intellect is only a poor fellow. However, this does not prevent it from being the most perfect instrument for clearly and plainly reflecting the finite phenomena of the infinite universe.