himself and without a guide, could not live long. Society is an additional sense; it is the true common sense.
Man, then, in his quality of an isolated individual, only sees, hears, touches, tastes, and smells in so far as is necessary for living and self-preservation. If he does not perceive colours below red or above violet, the reason perhaps is that the colours which he does perceive suffice for the purposes of self-preservation. And the senses themselves are simplifying apparati which eliminate from objective reality everything that it is not necessary to know in order to utilize objects for the purpose of preserving life. In complete darkness an animal, if it does not perish, ends by becoming blind. Parasites which live in the intestines of other animals upon the nutritive juices which they find ready prepared for them by these animals, as they do not need either to see or hear, do in fact neither see nor hear; they simply adhere, a kind of receptive bag, to the being upon whom they live. For these parasites the visible and audible world does not exist. It is enough for them that the animals, in whose intestines they live, see and hear.
Knowledge, then, is primarily at the service of the instinct of self-preservation, which is indeed, as we have said with Spinoza, its very essence. And thus it may be said that it is the instinct of self-preservation that makes perceptible for us the reality and truth of the world; for it is this instinct that cuts out and separates that which exists for us from the unfathomable and illimitable region of the possible. In effect, that which has existence for us is precisely that which, in one way or another, we need to know in order to exist ourselves; objective existence, as we know it, is a dependence of our own personal existence. And nobody can deny that there may not exist, and perhaps do exist, aspects of reality unknown to us, to-day at any rate, and perhaps unknowable, because they are in no way necessary to us for the preservation of our own actual existence.
But man does not live alone; he is not an isolated individual, but a member of society. There is not a little truth in the saying that the individual, like the atom, is an abstraction. Yes, the atom apart from the universe is as much an abstraction as the universe apart from the atom. And if the individual maintains his existence by the instinct of self-preservation, society owes its being and maintenance to the individual's instinct of perpetuation. And from this instinct, or rather from society, springs reason.
Reason, that which we call reason, reflex and reflective knowledge, the distinguishing mark of man, is a social product.
It owes its origin, perhaps, to language. We think articulately—i.e., reflectively—thanks to articulate language, and this language arose out of the need of communicating our thought to our neighbours. To think is to talk with oneself, and each one of us talks with himself, thanks to our having had to talk with one another. In everyday life it frequently happens that we hit upon an idea that we were seeking and succeed in giving it form—that is to say, we obtain the idea, drawing it forth from the mist of dim perceptions which it represents, thanks to the efforts which we make to present it to others. Thought is inward language, and the inward language originates in the outward. Hence it results that reason is social and common. A fact pregnant with consequences, as we shall have occasion to see.
Now if there is a reality which, in so far as we have knowledge of it, is the creation of the instinct of personal preservation and of the senses at the service of this instinct, must there not be another reality, not less real than the former, the creation, in so far as we have knowledge of it, of the instinct of perpetuation, the instinct of the species, and of the senses at the service of this instinct? The instinct of preservation, hunger, is the foundation of the human individual; the instinct of perpetuation, love, in its most rudimentary and physiological form, is the foundation of human society. And just as man knows that which he needs to know in order that he may preserve his existence, so society, or man in so far as he is a social being, knows that which he needs to know in order that he may perpetuate himself in society.
There is a world, the sensible world, that is the child of hunger, and there is another world, the ideal world, that is the child of love. And just as there are senses employed in the service of the knowledge of the sensible world, so there are also senses, at present for the most part dormant, for social consciousness has scarcely awakened, employed in the service of the knowledge of the ideal world. And why must we deny objective reality to the creations of love, of the instinct of perpetuation, since we allow it to the creations of hunger or the instinct of preservation? For if it be said that the former creations are only the creations of our imagination, without objective value, may it not equally be said of the latter that they are only the creations of our senses? Who can assert that there is not an invisible and intangible world, perceived by the inward sense that lives in the service of the instinct of perpetuation?
Human society, as a society, possesses senses which the individual, but for his existence in society, would lack, just as the individual, man, who is in his turn a kind of society, possesses senses lacking in the cells of which he is composed. The blind cells of hearing, in their dim consciousness, must of necessity be unaware of the existence of the visible world, and if they should hear it spoken of they would perhaps deem it to be the arbitrary creation of the deaf cells of sight, while the latter in their turn would consider as illusion the audible world which the hearing cells create.
We have remarked before that the parasites which live in the intestines of higher animals, feeding upon the nutritive juices which these animals supply, do not need either to see or hear, and therefore for them the visible and audible world does not exist. And if they possessed a certain degree of consciousness and took account of the fact that the animal at whose expense they live believed in a world of sight and hearing, they would perhaps deem such belief to be due merely to the extravagance of its imagination. And similarly there are social parasites, as Mr. A.J. Balfour admirably observes,[10] who, receiving from the society in which they live the motives of their moral conduct, deny that belief in God and the other life is a necessary foundation for good conduct and for a tolerable life, society having prepared for them the spiritual nutriment by which they live. An isolated individual can endure life and live it well and even heroically without in any sort believing either in the immortality of the soul or in God, but he lives the life of a spiritual parasite. What we call the sense of honour is, even in non-Christians, a Christian product. And I will say further, that if there exists in a man faith in God joined to a life of purity and moral elevation, it is not so much the believing in God that makes him good, as the being good, thanks to God, that makes him believe in Him. Goodness is the best source of spiritual clear-sightedness.
I am well aware that it may be objected that all this talk of man creating the sensible world and love the ideal world, of the blind cells of hearing and the deaf cells of sight, of spiritual parasites, etc., is merely metaphor. So it is, and I do not claim to discuss otherwise than by metaphor. And it is true that this social sense, the creature of love, the creator of language, of reason, and of the ideal world that springs from it, is at bottom nothing other than what we call fancy or imagination. Out of fancy springs reason. And if by imagination is understood a faculty which fashions images capriciously, I will ask: What is caprice? And in any case the senses and reason are also fallible.
We shall have to enquire what is this inner social faculty, the imagination which personalizes everything, and which, employed in the service of the instinct of perpetuation, reveals to us God and the immortality of the soul—God being thus a social product.
But this we will reserve till later.
And now, why does man philosophize?—that is to say, why does he investigate the first causes and ultimate ends of things? Why does he seek the disinterested truth? For to say that all men have a natural tendency to know is true; but wherefore?
Philosophers seek a theoretic or ideal starting-point for their human work, the work of philosophizing; but they are not usually concerned to seek the practical and real starting-point, the purpose. What is the object in making philosophy, in thinking it and then expounding it to one's fellows? What does the philosopher seek in it and with it? The truth for the truth's own sake? The truth, in order that we may subject our conduct to it and determine our spiritual attitude towards life and the universe comformably with it?
Philosophy is a product of the humanity of each