'Let it be remembered by controversialists on all subjects, that every speculative error which boasts a multitude of advocates has its golden as well as its dark side; that there is always some truth connected with it, the exclusive attention to which has misled the understanding; some moral beauty which has given it charms for the heart. Let it be remembered that no assailant of an error can reasonably hope to be listened to by its advocates, who has not proved to them that he has seen the disputed subject in the same point of view and is capable of contemplating it with the same feelings as themselves; for why should we abandon a cause at the persuasion of one who is ignorant of the reasons which have attached us to it?'
Adopting an illustration which had been employed by Bossuet for another purpose, I came to believe that religious systems resemble those pictures occasionally seen in the museums of the curious, which appear at first to be mere incongruous assemblages of unconnected and unmeaning figures, till they are regarded from one particular point of view, when these figures immediately mass themselves into a regular form, and the whole picture assumes a coherent and symmetrical appearance. To discover in each system this point of view; to cultivate that peculiar form of imagination which makes it possible to realise how different forms of opinions are held by their more intelligent adherents, appeared to me the first condition of understanding them.
In this method of inquiry I was, at a little later period, much aided by the writings of Bayle, a great critic who brought to the study of opinions an almost unrivalled knowledge, and one of the keenest and most detached of human intellects. Gradually, however, by a natural and insensible process I passed into the habit of examining opinions mainly from an historical point of view—investigating the circumstances under which they grow up; their relation to the general conditions of their time; the direction in which they naturally develop; the part, whether for good or ill, which during long spaces of time they have played in the world. It was first of all in connection with the Roman Catholic controversy, with which we were much occupied in Ireland, that I learnt to pursue this course. Of the enormous and essential difference between matured Catholicism and the Christianity of the New Testament, I never doubted, and my convictions were much deepened by long travels in Italy, France, and Spain, during which I endeavoured to study carefully Catholicism in its actual workings as a popular religion, and not as it appears clarified and rationalised in such books as the 'Exposition,' by Bossuet. I often asked myself, who could have imagined from a perusal of the New Testament that Christianity was intended to be a highly centralised monarchy, governed with supreme divine authority by the Bishop of Rome; that this bishop was to be connected, not with the great author of the Epistle to the Romans, but with St. Peter; that the figure which was to occupy the most prominent place in the devotions and imaginations of millions of Christian worshippers was to be the Virgin Mary, who is not so much as mentioned in the Epistles; that in the immediate neighbourhood, and with the full sanction of the highest ecclesiastical authorities, graven images were to be employed in devotion as conspicuously as in a pagan temple, particular images being singled out from all others for particular devotion by special indulgences and by special miracles? I soon convinced myself that popular Catholicism, as it exists in southern Europe and as it has existed through a long course of centuries, is as literally polytheistic and idolatrous as any form of paganism, though it has many beauties, and though much of its very mingled influence has been for good. In the teaching of my early youth, this transformation of Christianity was described as the great predicted apostasy, the mystery of iniquity, the work of Antichrist among mankind. Under the influence of the historic method it assumed a different aspect, and the mystery became very explicable. Hobbes had struck the keynote in a passage of profound truth as well as of admirable beauty:
'If a man consider the original of this great ecclesiastical dominion, he will easily perceive that the Papacy is no other than the ghost of the deceased Roman Empire, sitting crowned upon the grave thereof.'
Few evolutions in history, indeed, can be more clearly traced than the successive stages through which Rome, by a gradual and very natural process, obtained the primacy of Christendom. In the condition of Europe, again, at the time of the downfall of the Roman Empire, the invasion, the triumph, and the rapid conversion of the barbarians, the chief causes of the materialising transformation which Christian ideas underwent appeared abundantly evident; and it became clear to me that some such transformation was inevitable, and essential to their enduring influence. Was it possible, I asked myself, that in ages of anarchy and convulsion, any religion resembling Protestant Christianity could have prevailed among great masses of wild and ignorant barbarians, with all the associations and mental habits of idolaters, at a time when neither rag paper nor printing was invented, and when a wide diffusion of the Bible was absolutely impossible? But such methods of reasoning could not stop there. I was naturally led to consider how different are the measures of probability, the predispositions toward the miraculous, the canons of evidence and proof, the standards and ideals of morals in different ages, and how largely these differences affect the whole question of evidence. I began to realise the existence of climates of opinion; to observe how particular forms of belief naturally grow and flourish in certain stages of intellectual development, and fade when these conditions have changed; how much that is called apostasy and imposture is in reality anachronism, the survival in one age of forms of belief that were the appropriate product of an earlier one.
A writer of extraordinary brilliancy and power was at this time exercising a great influence either of attraction or repulsion on all serious students of history. Those who are old enough to remember the appearance of the first volume of Buckle's 'History,' in 1857, and of the second volume, in 1861, will remember also how rapidly and how passionately it divided opinion. It was in truth a book in which extraordinary merits were balanced by extraordinary defects. On the special subject of the growth of religions, which most interested me, it was peculiarly deficient, for with all his great gifts Buckle was almost colour-blind to the devotional and reverential aspect of things, and he had little more power than Whately of projecting himself into the beliefs, ideals, and modes of thought of other men and ages. His unqualified, undiscriminating contempt for the ages of superstition is the more remarkable, because fifteen years before the appearance of his first volume, Comte, with whom Buckle had some affinity, and for whom he expressed great admiration, had been placing those ages on a pinnacle of extravagant eulogy. His doctrine that there is no real progress in moral ideas and no real history of morals, I have always believed to be profoundly untrue, and to have vitiated a large part of his conclusions; and although he rendered valuable service in showing by ample illustrations that the capital changes in history are much less due to the great men who directly effected them than to the long train of intellectual, political, or industrial tendencies that had prepared them, he pushed this, like many of his other generalisations, to exaggeration and even to extravagance. Individuals, and even accidents, have had a great modifying and deflecting influence in history, and sometimes the part they have played can scarcely be over-estimated. If, as I have elsewhere said, a stray dart had struck down Mohammed in one of the early skirmishes of his career, there is no reason to believe that the world would have seen a great military and monotheistic religion arise in Arabia, powerful enough to sweep over a large part of three continents, and to mould during many centuries the lives and characters of about a fifth part of the human race. In one respect, too, Buckle was singularly unfortunate in the time in which he appeared. From the days of Bacon and Locke to the days of Condillac and Bentham, it had been the tendency of advanced liberal thinkers to aggrandise as much as possible the power of circumstances and experience over the individual, and to reduce to the narrowest limits every influence that is innate, transmitted, or hereditary. They represented man as essentially the creature of circumstances, and his mind as a sheet of blank paper on which education might write what it pleased. Buckle pushed this habit of thought so far that he even questioned the reality of such an evident and well-known fact as hereditary insanity. But only two years after the appearance of the first volume of the 'History of Civilisation,' Darwin published his 'Origin of Species,' which gradually effected a revolution in speculative philosophy almost as great as it effected in natural science; and from that time the supreme importance of inborn and hereditary tendencies has become the very central fact in English philosophy. It must be added that Buckle had many of the distinctive faults of a young writer; of a writer who had mixed little with men, and had formed his mind almost exclusively by solitary, unguided study. He had a very imperfect appreciation of the extreme complexity of social phenomena, an excessive tendency to sweeping generalisations, and an arrogance of assertion which provoked much hostility. His wide and multifarious knowledge was not always discriminating, and he sometimes mixed good and bad authorities with a strange indifference.
This is a long catalogue of defects, but in spite of them Buckle opened out wider horizons than any previous writer in the field of history. No other English historian had sketched his plan with so bold a hand, or had shown so clearly the transcendent importance of studying not merely the actions of soldiers, politicians, and diplomatists, but also those great connected evolutions of intellectual, social, and industrial life on which the type of each succeeding age mainly depends. To not a few of his contemporaries he imparted an altogether new interest in history, and his admirable literary talent, the vast range of topics which he illuminated with a fresh significance, and the noble enthusiasm for knowledge and for freedom that pervades his work, made its appearance an epoch in the lives of many who have passed far from its definite conclusions. The task which he had undertaken was almost too vast for the longest life, and when he died at Damascus, in 1862, he had not yet completed his fortieth year, and his judgment was probably still far from its full maturity. A few lines of Pliny which I wrote on the title-page of his history, will suffice to show the feelings with which I heard of his death:
'Mihi autem videtur acerba semper et immatura mors eorum qui immortale aliquid parant. Nam qui voluptatibus dediti quasi in diem vivunt, vivendi causas quotidie finiunt; qui vero posteros cogitant et memoriam sui operibus extendunt, his nulla mors non repentina est, ut quæ semper inchoatum aliquid abrumpat.'
I do not purpose to pursue these recollections further. I had drifted far from my Cork living and very decisively into the ways of literature, and after I left the university I spent about four years on the Continent. I read much in foreign libraries, and I also derived great profit as well as keen pleasure from the study of Italian art, which throws an invaluable light on the branches of history I was then investigating. In its earlier phase especially, before the sense of beauty dominates over the idea, art represents with a singular fidelity not only the religious beliefs of men, but also the far more delicate and evanescent shades of their realisations, ideals, and emotions.
The result of those years of study was my 'History of the Spirit of Rationalism in Europe,' which appeared in the early part of 1865. With many defects, it had at least the merit of describing with great sincerity the process by which the opinions of its author had been formed, and to this sincerity it probably owed no small part of its success.