Were this science, there would be no dispute. We should have to admit that there could be no limit set to the freedom of this being; he must share the privileges of divine Intelligence, for no command to keep silent can be imposed on Infallible Truth; there can be no amendment. But, alas! in the world of reality this personified Science is nowhere to be found, it exists solely in the realm of rhetoric and poetry. Science, as it exists among men, has its seat, after all, nowhere else than in the human mind. It is, indeed, nothing else but the well-ordered summary of knowledge and of the research for the causes of things. Natural science is the summary of knowledge and research in the realm of natural phenomena, arranged in an orderly way, as a text-book will give it; that is, an investigation of phenomena and their causes. A mere description of natural phenomena, without any explanation, or reference of them to the laws of nature, would indeed be teaching about nature, but not natural science. Similarly, the science of history is the well-ordered summary of knowledge and research in the domain of human events, derived from their sources, with the statement of facts according to cause and effect.
And not all this knowledge is certain, and free from doubt. The modern conception of science, as we now have it – the ancients had a much narrower conception – includes certain as well as uncertain knowledge, results and hypotheses, and even the activity of research, together with its methods. Astronomy was thus in Ptolemy's time the summary of what was then known with more or less certainty about the stars; included in this, as is well known, was the opinion that the sun circles around the earth. And the philosophy of Aristotle embraced his philosophical ideas about God, the world and man; hence many errors. Further, when speaking of science in general, we mean the whole number of the individual sciences. It is the freedom of science in this sense that we have to investigate here. The individual sciences are distinguished one from another principally by the subjects of which they treat. Astronomy is distinguished from palæontology and philosophy by the fact that it treats of the stars, not of fossils, or of the fundamental truths of reason.
From this brief analysis of concepts it is clear that science and scientific research are not superhuman beings, but an activity or condition of the human mind, distinguished from the ordinary thought of the individual only by system and method, and, commonly, by greater thoroughness and by the united effort of many. It is subject to all the limitations of the human mind.
What follows from this? Two things. Let us at once make a brief reference to both of them, because in our discussion they are of the greatest importance.
Since, then, science is an activity of the human mind, it must, like it, always and everywhere be subject to the Truth and subject to God. Subject to the Truth: whenever science comes in contact with it, it must reverently bow to the truth. And subject to God: if God is the Creator of man and of his spiritual and bodily activity, He is also the master of his whole being, and man is subject to Him in all his activity and development, therefore in his intellectual life, and in his artistic and scientific pursuits. Everything is and remains the activity of the creature. As gravitation rules the entire planet and its material activity, attracts it towards the sun and makes it circle around it, so does the law of dependence on God rule the whole life of the creature. Man cannot therefore, even in his scientific research, ignore his Creator, cannot emancipate himself from His authority; and if God has given a revelation and demands faith, the man of science, too, must believe. There cannot be an emancipated, free, science in this sense.
Another consequence is this: since science is an activity of the human mind, it shares all its imperfections and weaknesses. It is truly flesh of its flesh. The fruit cannot be more perfect than the tree that produces it, nor the flower better than the plant on which it blossomed. Now, as the human mind is throughout limited in its nature, so is it also in its research. It is not given to man to soar aloft on eagle wings to the heights of knowledge, thence to gaze upon truth with unerring intuition; the ascent must be slow, with constant dangers of stumbling, even of falling headlong. To these dangers must be added his latent likes and dislikes, which imperceptibly guide his thought, especially in forming opinions on questions of the world and of life, which the human heart cannot view with indifference: they influence his thought. Hence ignorance, darkness, and error, everywhere accompany the investigator individually, and science as a whole, all the more the loftier the questions that present themselves.
Already the philosopher of the dim past gave expression to the complaint, that our reason is no more capable of knowing the divine than the eyes of the owl are of seeing in broad daylight. It is Aristotle who so complains. And the great Newton, in the evening of his life, thus estimates the worth of his knowledge: “What the world may think about my labour, I do not know; I feel like a child that plays on the strand of the sea: now and then I may perhaps find a pebble or shell more beautiful than those of my playmates, while the boundless ocean lies ever before me with its undiscovered treasures” (apud O. Zoeckler, Gottes Zeugen im Reich der Natur (1906), 173). The same sorrowful plaint is heard from all serious investigators, especially those in the domain of the natural sciences, who should have more reason than others to be proud of their achievements. “However great the amount of human knowledge may seem to the multitude,” writes the well-known chemist Schoenbein, “the most experienced scientist feels the incompleteness and patchwork of it, and realizes that man so far has been able to learn but infinitely little of what nature is, and of what can be known.” “The more exact the investigation,” says the geologist Quenstedt, “so much the more obscure is its beginning. Indeed, the deeper we think to have understood the single parts, the further the original plan of the Creator seems to escape us” (cf. Kneller, Das Christentum und die Vertreter der neueren Naturwissenschaften (1904), 208, 281). “Although science,” so we are assured by another modern savant, “has brought to light many a treasure, still, compared with what we do not yet know, it is as a drop to the ocean. In all our knowledge there will always be the danger of error.” We are probably not very far in advance of the time of Albrecht von Haller, who said: “We, all of us, err, only each errs in a different way. Every passage that has been illuminated by science is surrounded by dense darkness; beyond the visible lies the invisible.” And Prof. J. Reinke continues: “As early as the day of Socrates, the beginning of philosophy was to know that we know nothing; the end of philosophy, to know that we must believe: such is the inevitable fate of human wisdom” (Naturwissenschaft und Religion, in Natur und Kultur IV (1907), 418, 425. Printed also separately). Some years ago Sir W. Ramsay, a noted scientist, concluded a discourse on his scientific labour with the words: “When a man has reached the middle of his life, he begins to believe that the longer he lives the less he knows! This is my excuse for having molested you for an hour with my ignorance” (Einige Betrachtungen ueber das periodische Gesetz der Elemente. Vortrag auf der 75. Versammlung Deutscher Naturforscher und Ærzte zu Cassel (1903)).
If science, then, can only with difficulty lift from visible nature the veils that hide the truth – and even this is often beyond its power – no wonder it is confronted with still greater obstacles when it approaches the truths that are beyond visible nature. Moreover, it is an old truth that here it is led not by reason only, but also, and even more energetically, by self-interest. “Most men,” says Cicero, “are swayed in their judgments by either love or hatred, likes or dislikes” (De Oratore, II, 42).
If this is the nature of human science, its adepts would be badly deceiving themselves, if, in the pride of learning, they would reject every correction, even proudly pushing aside the hand of God that reaches down into the darkness of man's intellectual life to offer its guidance. He who realizes that he is in danger of losing his way in the dark, will not reject a reliable guide; and he who fears to stumble will not refuse a helping hand. Self-knowledge is the sister of wisdom, and the mother of modesty.
Freedom
Such, then, is science: not the goddess that emanated from the head of immortal Jove, but the offspring of the puny mind of man, bone of his bone and flesh of his flesh. And this science cries for freedom. It would be free and act freely; it urges its claim in the name of truth, which must not be slighted; in the name of the progress of civilization, which must not be hindered.
Freedom clearly means nothing less than to be untrammeled and free from restraint, from fetter