Indeed biographical notices, if they could be extended compatibly with the compass of the subject, would be the most instructive and vivid mode of presenting alike the facts relating to scepticism and their interpretation. Such memoirs are not wanting, and [pg 034] are among the most touching in literature. The sketch which Strauss has given of his early friend and fellow student Maerklin,[113] gradually surrendering one cherished truth after another, until he doubted all but the law of conscience; then devoting himself in the strength of it with unflinching industry to education; until at last he died in the dark, without belief in God or hope, cheered only by the consciousness of having tried to find truth and do his duty:—the sad tale, told by two remarkable biographers, of Sterling,[114] doubting, renouncing the ministry, yet thirsting for truth, and at last solacing himself in death by the hopes offered by the Bible, to the eternal truths of which his doubting heart had always clung:—the memoir of the adopted son of our own university, Blanco White,[115] a mind in which faith and doubt were perpetually waging war, till the grave closed over his truth-searching and care-worn spirit:—the confessions of one of our own sons of the successive “phases of faith”[116] through which his soul passed from evangelical Christianity to a spiritual Deism, a record of heart-struggles which takes its place among the pathetic works of autobiography, where individuals have unveiled their inner life for the instruction of their fellow-men:—all these are instances where [pg 035] the great moral and spiritual problems that belong to the condition of our race may be seen embodied in the sorrowful experience of individuals. They are instances of rare value for psychological study in reference to the history of doubt; sad beacons of warning and of guidance. Accordingly, in the history of free thought we must not altogether neglect the spiritual biography of the doubter, though only able to indicate it by a few touches; by an etching, not a photograph.
We have now added to the explanation before given of the province of our inquiry, and of the law of the action of free thought on religion, an account of the moral and intellectual causes which operate in the history of unbelief, and have sufficiently explained the mode in which the subject will be treated.
The use of the inquiry will, it is hoped, be apparent both in its theoretical and practical relations. It is designed to have an intellectual value not only as instruction but as argument. The tendency of it will be in some degree polemical as well as didactic, refuting error by analysing it into its causes, repelling present attacks by studying the history of former ones.
It is one peculiar advantage belonging to the philosophical investigation of the history of thought, that even the odious becomes valuable as an object of study, the pathology of the soul as well as its normal action. Philosophy takes cognisance of error as well as of truth, inasmuch as it derives materials from both for discovering a theory of the grounds of belief and disbelief. Hence it follows that the study of the natural history of doubt combined with the literary, if it be the means of affording an explanation of a large class of facts relating to the religious history of man and the sphere of the remedial operations of Christ's church, will have a practical value as well as speculative.
Such an inquiry, if it be directed, as in the present lectures, to the analysis of the intellectual rather than the emotional element of unbelief, as being that which has been less generally and less fully explored, will require to be supplemented by a constant reference to [pg 036] the intermixture of the other element, and the consequent necessity of taking account of the latter in estimating the whole phenomenon of doubt. But within its own sphere it will have a practical and polemical value, if the course of the investigation shall show that the various forms of unbelief, when studied from the intellectual side, are corollaries from certain metaphysical or critical systems. The analysis itself will have indirectly the force of an argument. The discovery of the causes of a disease contains the germ of the cure. Error is refuted when it is referred to the causes which produce it.
Nor will the practical value of the inquiry be restricted to its use as a page in the spiritual history of the human mind, but will belong to it also as a chapter in the history of the church. For even if in the study of the contest our attention be almost wholly restricted to the movements of one of the two belligerents, and only occasionally directed to the evidences on which the faith of the church in various crises reposed, and by which it tried to repel the invader, yet the knowledge of the scheme of attack cannot fail to be a valuable accompaniment to the study of the defence.[117]
Thus the natural history of doubt, viewed as a chapter of human history, like the chapter of physiology which studies a disease, will point indirectly to the cure, or at least to the mode of avoiding the causes which induce the disease; while the literary history of it, viewed as a chapter of church history, will contribute the results of experience to train the Christian combatant.
The subject will however not only have an intellectual value in being at once didactic and polemical, offering an explanation of the causes of unbelief and furnishing hints for their removal; but it cannot fail also to possess a moral value in reference to the conscience and heart of the disputant, in teaching the lesson of mercy towards the unbeliever, and deep pity [pg 037] for the heart wounded with doubts. An intelligent acquaintance with the many phases of history operates like foreign travel in widening the sympathies; and increase of knowledge creates the moderation which gains the victory through attracting an enemy instead of repelling him. Bigotry is founded on ignorance and fear. True learning is temperate, because discriminating; forbearing, because courageous. If we place ourselves in the position of an opponent, and try candidly to understand the process by which he was led to form his opinions, indignation will subside into pity, and enmity into grief: the hatred will be reserved for the sin, not for the sinner; and the servant of Jesus Christ will thus catch in some humble measure the forbearing love which his divine Master showed to the first doubting disciple.[118] As the sight of suffering in an enemy changes the feeling of anger into pity, so the study of a series of spiritual struggles makes us see in an opponent, not an enemy to be crushed, but a brother to be won. The utility of a historic treatment of doubt is suggested by moral as well as intellectual grounds.
I hope therefore that if I follow the example of some of my predecessors,[119] in giving a course of lectures historical rather than polemical, evincing the critic rather than the advocate, seeking for truth rather than victory, analysing processes of evidence rather than refuting results, my humble contribution toward the knowledge of the argument of the Christian evidences will be considered to come fairly within the design intended by the founder of the lecture.
It may well be believed that in the execution of so large a scheme I have felt almost overwhelmed under a painful sense of its difficulty. If even I may venture to hope that a conscientious study in most cases of the [pg 038] original sources of information may save me from literary mistakes, yet there is a danger lest the size of the subject should preclude the possibility of constant clearness; or lest the very analysis of the errors of the systems named, may produce a painful, if not an injurious, impression. In an age too of controversy, those who speak on difficult questions incur a new danger, of being misunderstood from the sensitiveness with which earnest men not unreasonably watch them. The attitude of suspicion may cause impartiality to be regarded as indifference to truth, fairness as sympathy with error. I am not ashamed therefore to confess, that under the oppressive sense of these various feelings I have been wont to go for help to the only source where the burdened heart can find consolation; and have sought, in the communion with the Father of spirits which prayer opens to the humblest, a temper of candour, of reverence, and of the love of truth. In this spirit I have made my studies; and what I have thus learned I shall teach.