He had, meantime, given a fair trial to philanthropy. Theoretically and practically, Isaac Hecker loved humanity; to make men happy was his ever-renewed endeavor; was, in truth, the condition on which his own happiness depended. For years this view of his life-task alternated with his search for exact answers to the questions his soul asked about man's destiny hereafter; or, one might rather say, social questions and philosophical ones borrowed strength from each other to assail him till his heart throbbed and his brain whirled with the agony of the conflict.
In a series of articles in The Catholic World published in 1887, and before referred to, Father Hecker called Dr. Brownson's road to the Church the philosophical road. Finding that doctrines which his philosophical mind perceived to answer the deepest questions of the soul were taught only in one society, and there taught with authority, he argued validly that that society could lay claim to the right to teach. From the doctrine to the teacher, from the truth to the external authority that teaches it, is an inference of sound reason. This applies to Father Hecker's case also, for he was of a bent of mind truly philosophical, and he has placed on record the similarity of his philosophical difficulties with those of Brownson. But in addition to philosophical questions, and far more pressing, were to Isaac Hecker the problems arising from the mystical occurrences of which his soul was the theatre. Were these real? that is, were they more than the vagaries of a sensitive temperament, the wanderings of a sentimental imagination, or, to use Father Hecker's own words, "the mere projections into activity of feelings entirely subjective; mystical impulses towards no corresponding objective realities, or, at any rate, with objects which it is not possible to bring into the field of the really knowable? Some will admit that religious feeling is as much a verity as any other part of human consciousness, affirming, however, the subjectivity of all purely spiritual life; and no more can be said, they insist, for the principles, metaphysical and logical, with which they are associated in the spiritual life of man. Now, such a theory never leaves the soul that is governed by reason at rest. The problem ever and again demands solution: are these yearnings, aspirations, unappeased desires, or religious feelings—the ruling traits of the noblest men and women—are they genuine, real, corresponding to and arising from the reality of certain objects external to the soul? I think that in the solution of this problem Dr. Brownson fought and won his greatest victory; at any rate, it was to me the most interesting period of his life. No wonder, since I had the same battle to fight myself, and it was just at this epoch that I came into closest contact with him. We fought this battle shoulder-to-shoulder."—Catholic World, October, 1887, pp. 5-6.
Brownson's heavy heart was due to philosophical difficulties, and Isaac Hecker's to the same; but in addition the latter had a mystical experience to which Brownson was at that time, certainly, a stranger, and, as far as we know, he remained so; and these mystical difficulties demanded settlement far more imperatively than did the philosophical ones. Isaac Hecker's inner life must have an external adjunct of divine authority. Such aspirations of the soul for present union with God in love as he had, are more peremptory in demanding satisfaction than those of the logical faculty in demanding the ascertainment of the certain truth. Philosophy outside the Church is to the searcher after truth what St. Paul said the Law was to the Jews, a schoolmaster; but, to a soul in the condition of Isaac Hecker, the Holy Spirit is a spouse demanding union. Both Brownson and himself were men true to their convictions, courageous and unselfish. They were both firmly determined to have the truth and to have the whole of it, whether spoken ex cathedra in the divine court of the innermost soul, or ex cathedra by the supreme authority of God in the organism of the Christian Church. "Brownson was firmly persuaded," says Father Hecker, "and so am I, that the great fault of men generally is that they deem the life of their souls, thoughts, judgments, and convictions, yearnings, aspirations, and longings to be too subject to illusion to be worthy their attentive study and manly fidelity; that even multitudes of Catholics greatly undervalue the divine reality of their inner life, whether in the natural or supernatural order."
The philosophical difficulty was far less serious than the spiritual one. To the philosopher the fundamental truths of human reason are established as objective realities by processes common to every sane mind, and are backed by the common consent of men; and this is true also of the prime verities of ethics. But when a man finds himself subject to secret influences of the utmost power over him, able to cast him off or to hold him, to sicken his body and distress his soul, extending his views of the truth by flashes of light into vistas that seem infinite, making his love of right an ecstasy, his sympathy for human misery a passion, controlling his diet and his clothing, ordering him here and there at will and knowing how to be obeyed—when, in a word, a man finds himself treated by God in a manner totally different from any one else he knows or ever heard of, it is plain that he must agonize for the possession of a divine sanction to which he can appeal in common with all men, and which must therefore exist in the external order. He longs, above all things, to test his secret in the light of day.
The problem that Isaac Hecker had to solve, as he described it himself, was whether his life was real—using the word "life" to denote its truest meaning, the interior life. We have been careful to make the reader aware of how deep and continuous were the inner touches of the Holy Spirit which led him on. Before applying for admission to the Church, there was no truth that he could believe more firmly than that he was the temple of the Holy Ghost. Of that he had the certitude which is called personal and the teaching of God which is most direct. Yet something was lacking, and therein lay his agony, for he knew that his fellow-men were entitled to all that he had of truth and virtue. The more distinct the Voice which spoke within, the more perplexing it became to hear no echo from without. He felt sure that what was true and holy for him must be so for all, and yet he could not so much as make himself understood if he told his secret to others. To the born Catholic there is no such difficulty. He is so fully accustomed to the verification of the inner action of God, enlightening his mind and stinging his conscience, by God's external action in the Church, that he often confounds the two. He knows the Voice better by its echo than by its own tones. There are many good Catholics, but few enlightened mystics. This is not for lack of guidance, so far as doctrine is concerned, for accredited authors on such subjects are numerous and their teaching is uniform and explicit, besides being of the most intense interest to those for whose instruction it is adapted. These masters of spiritual doctrine not only dwell upon the interior life itself, but also on the external order of God in His Church which brings His interior teaching into proper relation with the exterior. The interior life thus made integral is alone worthy of the term real; is alone worthy of the description of St. Paul when he calls it "the witness of the Spirit." Now, as a witness who cannot be brought into open court to give his testimony might as well be dumb, and is as good as no witness, so the inner life, lacking the true external order of God, is cramped and helpless; and cramped and helpless Isaac Hecker was. Whatever he did, therefore, toward investigating religious evidences was done primarily as a search for the external criterion which should guarantee the validity of the inspirations of God within him, and at the same time provide a medium of union with his fellow-men.
Those whose advertence is not particularly aroused to the facts of their interior life, have for their main task either the study of the Church as a visible society, claiming continuity with one established by Christ; or, preceding that, the question whether such a society was ever founded by God. Now, although such questions must be settled by all, they are not the main task of men like Isaac Hecker. In their case the problem transcending all others is where to find that divine external order demanded for the completion of their inner experience. Such men must say: If there is no external order of God in this world, then my whole interior life is fatally awry.
The captain whose voyage is on the track of the trade winds nevertheless needs more than dead reckoning for his course; he needs to take the sun at noon, to study the heavens at night, and to con his chart. To follow one's interior drift only is to sail the ocean without chart or compass. The sail that is wafted by the impulses of the divine Spirit in the interior life must have, besides, the guarantee of divine veracity in the external order to justify him. This he needs, in order to safeguard him in the interior life itself, and to provide a common court of appeal between himself and his fellows, or otherwise he is in danger of fanaticism, and is certain of the mistrust of his fellow-men. No man, unsupported by external miracles, can claim to teach what is vouched for only by his own testimony; and this especially applies to purely subjective experiences. Isaac Hecker was a born teacher of men, and to be shut off from them by an isolated experience was to be robbed of his vocation. A soul like his, led to the truth along the path of social reform, will hail with delight a religion which organizes all humanity on a basis of equality, and at the same time verifies and explains the facts of each one's particular experience. Such a religion is to be longed for, not only because of its universal brotherhood, but also because it can decide between the inspirations of the Holy Spirit and the criminal conceits of passion or the dreams of an imaginative temperament.
Many years afterwards Father Hecker thus stated the harmony between the inner and outer action of God in the soul's life:
"In case of obscurity or doubt concerning what is the divinely revealed truth, or whether what prompts the soul is or is not an inspiration of the Holy Spirit, recourse must be had to the divine teacher or criterion—the authority of the Church. For it must be borne in mind that to the Church, as represented in the first instance by St. Peter and subsequently by his successors, was made the promise of her divine Founder that 'the gates of hell should never prevail against her.' No such promise was ever made by Christ to each individual believer. 'The Church of the living God is the pillar and ground of truth.' The test, therefore, of a truly enlightened and sincere Christian will be, in case of uncertainty, the promptitude of his obedience to the voice of the Church.
"From the above plain truths the following practical rule of conduct may be drawn: The Holy Spirit is the immediate guide of the soul in the way of salvation and sanctification; and the criterion or test, that the soul is guided by the Holy Spirit, is its ready obedience to the authority of the Church. This rule removes all danger whatever, and with it the soul can walk, run, or fly, if it chooses, in the greatest safety and with perfect liberty, in the ways of sanctity."—The Church and the Age, p. 35.