The Life of Reason: The Phases of Human Progress. George Santayana

natural science need no longer appeal. While in the shock of life man was always coming upon the accidental, in the quiet of reflection he could not but recast everything in ideal moulds and retain nothing but eternal natures and intelligible relations. Aristotle conceived that while the origin of knowledge lay in the impact of matter upon sense its goal was the comprehension of essences, and that while man was involved by his animal nature in the accidents of experience he was also by virtue of his rationality a participator in eternal truth. A substantial justice was thus done both to the conditions and to the functions of human life, although, for want of a natural history inspired by mechanical ideas, this dualism remained somewhat baffling and incomprehensible in its basis. Aristotle, being a true philosopher and pupil of experience, preferred incoherence to partiality.

      Empirical bias in favour of contiguity.

      Active life and the philosophy that borrows its concepts from practice has thus laid a great emphasis on association by contiguity. Hobbes and Locke made knowledge of this kind the only knowledge of reality, while recognising it to be quite empirical, tentative, and problematical. It was a kind of acquaintance with fact that increased with years and brought the mind into harmony with something initially alien to it. Besides this practical knowledge or prudence there was a sort of verbal and merely ideal knowledge, a knowledge of the meaning and relation of abstract terms. In mathematics and logic we might carry out long trains of abstracted thought and analyse and develop our imaginations ad infinitum. These speculations, however, were in the air or—what for these philosophers is much the same thing—in the mind; their applicability and their relevance to practical life and to objects given in perception remained quite problematical. A self-developing science, a synthetic science a priori, had a value entirely hypothetical and provisional; its practical truth depended on the verification of its results in some eventual sensible experience. Association was invoked to explain the adjustment of ideation to the order of external perception. Association, by which association by contiguity was generally understood, thus became the battle-cry of empiricism; if association by similarity had been equally in mind, the philosophy of pregnant reason could also have adopted the principle for its own. But logicians and mathematicians naturally neglect the psychology of their own processes and, accustomed as they are to an irresponsible and constructive use of the intellect, regard as a confused and uninspired intruder the critic who, by a retrospective and naturalistic method, tries to give them a little knowledge of themselves.

      Artificial divorce of logic from practice.

      Rational ideas must arise somehow in the mind, and since they are not meant to be without application to the world of experience, it is interesting to discover the point of contact between the two and the nature of their interdependence. This would have been found in the mind's initial capacity to frame objects of two sorts, those compacted of sensations that are persistently similar, and those compacted of sensations that are momentarily fused. In empirical philosophy the applicability of logic and mathematics remains a miracle or becomes a misinterpretation: a miracle if the process of nature independently follows the inward elaboration of human ideas; a misinterpretation if the bias of intelligence imposes a priori upon reality a character and order not inherent in it. The mistake of empiricists—among which Kant is in this respect to be numbered—which enabled them to disregard this difficulty, was that they admitted, beside rational thinking, another instinctive kind of wisdom by which men could live, a wisdom the Englishmen called experience and the Germans practical reason, spirit, or will. The intellectual sciences could be allowed to spin themselves out in abstracted liberty while man practised his illogical and inspired art of life.

Here we observe a certain elementary crudity or barbarism which the human spirit often betrays when it is deeply stirred. Not only are chance and divination welcomed into the world but they are reverenced all the more, like the wind and fire of idolaters, precisely for not being amenable to the petty rules of human reason. In truth, however, the English duality between prudence and science is no more fundamental than the German duality between reason and understanding.[A] The true contrast is between impulse and reflection, instinct and intelligence. When men feel the primordial authority of the animal in them and have little respect for a glimmering reason which they suspect to be secondary but cannot discern to be ultimate, they readily imagine they are appealing to something higher than intelligence when in reality they are falling back on something deeper and lower. The rudimentary seems to them at such moments divine; and if they conceive a Life of Reason at all they despise it as a mass of artifices and conventions. Reason is indeed not indispensable to life, nor needful if living anyhow be the sole and indeterminate aim; as the existence of animals and of most men sufficiently proves. In so far as man is not a rational being and does not live in and by the mind, in so far as his chance volitions and dreamful ideas roll by without mutual representation or adjustment, in so far as his body takes the lead and even his galvanised action is a form of passivity, we may truly say that his life is not intellectual and not dependent on the application of general concepts to experience; for he lives by instinct.

      Their mutual involution.

      The Life of Reason, the comprehension of causes and pursuit of aims, begins precisely where instinctive operation ceases to be merely such by becoming conscious of its purposes and representative of its conditions. Logical forms of thought impregnate and constitute practical intellect. The shock of experience can indeed correct, disappoint, or inhibit rational expectation, but it cannot take its place. The very first lesson that experience should again teach us after our disappointment would be a rebirth of reason in the soul. Reason has the indomitable persistence of all natural tendencies; it returns to the attack as waves beat on the shore. To observe its defeat is already to give it a new embodiment. Prudence itself is a vague science, and science, when it contains real knowledge, is but a clarified prudence, a description of experience and a guide to life. Speculative reason, if it is not also practical, is not reason at all. Propositions irrelevant to experience may be correct in form, the method they are reached by may parody scientific method, but they cannot be true in substance, because they refer to nothing. Like music, they have no object. They merely flow, and please those whose unattached sensibility they somehow flatter.

      Hume, in this respect more radical and satisfactory than Kant himself, saw with perfect clearness that reason was an ideal expression of instinct, and that consequently no rational spheres could exist other than the mathematical and the empirical, and that what is not a datum must certainly be a construction. In establishing his "tendencies to feign" at the basis of intelligence, and in confessing that he yielded to them himself no less in his criticism of human nature than in his practical life, he admitted the involution of reason—that unintelligible instinct—in all the observations and maxims vouchsafed to an empiricist or to a man. He veiled his doctrine, however, in a somewhat unfair and satirical nomenclature, and he has paid the price of that indulgence in personal humour by incurring the immortal hatred of sentimentalists who are too much scandalised by his tone ever to understand his principles.

      Rationalistic suicide.

      If the common mistake in empiricism is not to see the omnipresence of reason in thought, the mistake of rationalism is not to admit its variability and dependence, not to understand its natural life. Parmenides was the Adam of that race, and first tasted the deceptive kind of knowledge which, promising to make man God, banishes him from the paradise of experience. His sin has been transmitted to his descendants, though hardly in its magnificent and simple enormity. "The whole is one," Xenophanes had cried, gazing into heaven; and that same sense of a permeating identity, translated into rigid and logical terms, brought his sublime disciple to the conviction that an indistinguishable immutable substance was omnipresent in the world. Parmenides carried association by similarity to such lengths that he arrived at the idea of what alone is similar in everything, viz., the fact that it is. Being exists, and nothing else does; whereby every relation and variation in experience is reduced to a negligible illusion, and reason loses its function at the moment of asserting its absolute authority. Notable lesson, taught us like so many others by the first experiments of the Greek mind, in its freedom and insight, a mind led quickly by noble self-confidence to the ultimate goals of thought.

      Such a pitch of heroism and abstraction has not been reached by any rationalist