The social condition of Ireland attracted Berkeley almost as soon as he was settled in Cloyne. He was surrounded by a large native Irish population and a small group of English colonists. The natives, long governed in the interest of the stranger, had never learned to exert and govern themselves. The self-reliance which Berkeley preached fifteen years before, as a mean for “preventing the ruin of Great Britain,” was more wanting in Ireland, where the simplest maxims of social economy were neglected. It was a state of things fitted to move one who was too independent to permit his aspirations to be confined to the ordinary routine of the Irish episcopate, and who could not forget the favourite moral maxim of his life.
The social chaos of Ireland was the occasion of what [pg lxxv] to some may be the most interesting of Berkeley's writings. His thoughts found vent characteristically in a series of penetrating practical queries. The First Part of the Querist appeared in 1735, anonymously, edited by Dr. Madden of Dublin, who along with Prior had lately founded a Society for promoting industrial arts in Ireland. The Second and Third Parts were published in the two following years. A Discourse to Magistrates occasioned by the Enormous Licence and Irreligion of the Times, which appeared in 1736, was another endeavour, with like philanthropic intention. And the only important break in his secluded life at Cloyne, in eighteen years of residence, was when he went for some months to Dublin in 1737, to render social service to Ireland in the Irish House of Lords.
His metaphysic, at first encountered by ridicule, was now beginning to receive more serious treatment. A Scotsman had already recognised it. In 1739 another and more famous Scotsman, David Hume, refers thus to Berkeley in one of the opening sections of his Treatise of Human Nature: “A very material question has been started concerning abstract or general ideas—whether they be general or particular in the mind's conception of them. A great philosopher, Dr. Berkeley, has disputed the received opinion in this particular, and has asserted that all general ideas are nothing but particular ones, annexed to a certain term which gives them a more extensive signification, and makes them recall upon occasion other individuals which are similar to them. I look upon this to be one of the greatest and most valuable discoveries that has been made of late years in the republic of letters.” It does not appear that Berkeley heard of Hume.
A curious interest began to engage him about this time. The years following 1739 were years of suffering in the [pg lxxvi] Irish diocese. It was a time of famine followed by widespread disease. His correspondence is full of allusions to this. It had consequences of lasting importance. Surrounded by disease, he pondered remedies. Experience in Rhode Island and among American Indians suggested the healing properties of tar. Further experiments in tar, combined with meditation and much curious reading, deepened and expanded his metaphysical philosophy. Tar seemed to grow under his experiments, and in his thoughts, into a Panacea for giving health to the organism on which living mind in man is meanwhile dependent. This natural dependence of health upon tar introduced thoughts of the interdependence of all things, and then of the immediate dependence of all in nature upon Omnipresent and Omnipotent Mind. The living Mind that underlies the phenomena of the universe began to be conceived under a new light. Since his return to the life of thought in Rhode Island, he had been immersed in Platonic and Neoplatonic literature, and in books of mystical Divinity, encouraged perhaps by the mystical disposition attributed to his wife. An eccentric ingenuity connected the scientific experiments and prescriptions with the Idealism of Plato and Plotinus. The natural law according to which tar-water was universally restorative set his mind to work about the immanence of living Mind. He mused about a medicine thus universally beneficial, and the thought occurred that it must be naturally charged with 'pure invisible fire, the most subtle and elastic of bodies, and the vital element in the universe'; and water might be the natural cause which enables this elementary fire to be drawn out of tar and transferred to vegetable and animal organisms. But the vital fire could be only a natural cause; which in truth is no efficient cause at all, but only a sign of divine efficiency transmitted through the world of sense: the true cause of this and all other natural effects must be the immanent Mind or Reason in which [pg lxxvii] we all participate; for in God we live and move and have our being.
It is thus that Berkeley's thought culminates in Siris, that Chain of Philosophical Reflexions and Inquiries concerning the Virtues of Tar-water, and divers other subjects connected together and arising one from another, which appeared in 1744. This little book made more noise at the time of its appearance than any of his books; but not because of its philosophy, which was lost in its medicinal promise to mankind of immunity from disease. Yet it was Berkeley's last attempt to express his ultimate conception of the universe in its human and divine relations. When Siris is compared with the book of Principles, the immense difference in tone and manner of thought shews the change wrought in the intervening years. The sanguine argumentative gladiatorship of the Principles is exchanged for pensive speculation, which acknowledges the weakness of human understanding, when it is face to face with the Immensities and Eternities. Compare the opening sections of the Introduction to the Principles with the closing sections of Siris. The contingent data of our experience are now felt to be insufficient, and there is a more or less conscious grounding of the Whole in the eternal and immutable Ideas of Reason. “Strictly, the sense knows nothing. We perceive, indeed, sounds by hearing and characters by sight. But we are not therefore said to understand them.... Sense and experience acquaint us with the course and analogy of appearances and natural effects: thought, reason, intellect, introduce us into the knowledge of their causes.... The principles of science are neither objects of sense nor imagination: intellect and reason are alone the sure guides to truth.” So the shifting basis of the earlier thought is found to need support in the intellectual and moral faith that must be involved in all reasonable human intercourse with the phenomena presented in the universe.
The inadequate thought of God, as only a Spirit or Person supreme among the spirits or persons, in and through whom the material world is realised, a thought which pervades Alciphron, makes way in Siris for the thought of God as the infinite omnipresent Ground, or final sustaining Power, immanent in Nature and Man, to which Berkeley had become accustomed in Neoplatonic and Alexandrian metaphysics. “Comprehending God and the creatures in One general notion, we may say that all things together (God and the universe of Space and Time) make One Universe, or τὸ Πᾶν. But if we should say that all things make One God, this would be an erroneous notion of God; but would not amount to atheism, as long as Mind or Intellect was admitted to be τὸ ἡγεμονικόν, or the governing part.... It will not seem just to fix the imputation of atheism upon those philosophers who hold the doctrine of τὸ Ἕν.” It is thus that he now regards God. Metaphysics and theology are accordingly one.
No attempt is made in Siris to articulate the universe in the light of unifying Mind or Reason. And we are still apt to ask what the truth and goodness at the heart of all really mean; seeing that, as conceived in human minds, they vary in the gradual evolution of intellect and conscience in men. Omnia exeunt in mysteria is the tone of Siris at the end. The universe of reality is too much for our articulate intellectual digestion: it must be left for omniscience; it transcends finite intelligence and the via media of human understanding. Man must be satisfied to pass life, in the infinitesimal interval between birth and death, as a faith-venture, which he may convert into a growing insight, as the generations roll on, but which can never be converted into complete knowledge. “In this state we must be satisfied to make the best of those glimpses within our reach. It is Plato's remark in his Theætetus, that while we sit still we are never the wiser; but going into the river, and moving up and down, [pg lxxix] is the way to discover its depths and shallows. If we exercise and bestir ourselves, we may even here discover something. The eye by long use comes to see even in the darkest cavern; and there is no subject so obscure but we may discern some glimpse of truth by long poring on it. Truth is the cry of all, but the game of a few. Certainly where it is the chief passion it doth not give way to vulgar cares and views; nor is it contented with a little ardour in the early time of life: a time perhaps to pursue, but not so fit to weigh and revise. He that would make a real progress in knowledge must dedicate his age as well as his youth, the later growth as well as the first-fruits, at the altar of Truth.” Such was Berkeley, and such were his last words in philosophy. They may suggest the attitude of Bacon when, at a different view-point, he disclaims exhaustive system: “I have made a beginning of the work: the fortune of the human race will give the issue. For the matter in hand is no mere felicity of speculation, but the real business and fortunes of the human race[34].”