But I wish to use the text chiefly for the elucidation of a single subject. Paul’s words express the assurance of his faith. How does this subject strike us? Does not the very mention of it give rise to sad reflections in many hearts? “The assurance of faith.” “Ah, I knew it once,” we say; “it was the experience of earlier days, and has been the experience of some special days since then, still more so of some specially holy moments. But it is not my normal state. Would it were!”

We are living in a period in which there seems to be a general disinclination towards whatever is firm and precise in religious creed, feeling, and life. This may not be an altogether unhopeful state of things. Respect for truth may keep some minds silent concerning their beliefs, or at least may prevent them from avowing those beliefs too dogmatically. Anxiety and doubt may even in some cases be a sign of spiritual earnestness. Yet the tendency we speak of is on the whole to be deeply deplored. The truth is that the world has invaded us. Men shrink from great precision of conviction because they shrink from great consecration of life. How few the lives that are pre-eminently Christian, as Paul’s was! On the other hand, our day is remarkable for its craving for mere religious excitement. In many cases, it is not so much the desire for truth, as the desire to be excited and pleased, that prevails. Neither of these tendencies can build up the faith which finds its grand avowal in the words: “I know whom I have believed, and am persuaded that He is able to keep that which I have committed unto Him against that day.”

The remedy for the state of things upon which I have touched cannot now be pointed out, because it would lead me away from my purpose. But I want to show the effect of it upon ourselves, and upon those who are without. There are certain aims common to the Christian life of all of us, and these cannot be reached so long as our faith lacks steadiness and stability.

1. Our great mission is to convert souls. We are avowedly the instruments of the Spirit of God in this momentous work. But what is the conversion of a soul? It is a radical change in its affections and its life. But this change never takes place apart from the influence of deep convictions. Men will not exchange the known for the unknown: actual life with its passions and its pleasures for the weak and cold abstractions of a faith with no precision in its principles, or for the worship of a God who is vague and problematical. How are we to succeed in winning souls to the truth we profess unless we can produce something which ought to convince them that we have the right of it? An unstable faith will be of little use to us here. There must be no hesitation in our avowal that our transition from the world to God is a blessed one. In other matters, a man of strong beliefs has half won us to his side. In religion, it is notoriously so. Paul’s grand words have been a source of strength to us. Let us make them our own—the expression of our own faith—and they will become, through us, a source of strength to others. Let us have this same Christianity in its fulness and its power; and having it, let us avow it without timidity and without reserve.

2. Our personal obligation, as Christians, is to be holy; and we want the assurance of faith for that. We may be deceived about our conversion. At the outset of our Christian life we may be the subjects of many illusions. But men are not mistaken when, day by day, they are fighting their passions, bringing the will into subjection, conquering the flesh, and submitting the whole life to the long, slow, toilsome discipline of obedience. This kind of work is never accomplished by a vague and undecided religion. Men do not deny themselves without an equivalent. You cannot persuade them to give up their illusions, their pleasures, their passions, nor even their vices, unless you show them something else which may, must, and ought to take their place. If you empty the heart of one set of elements, you must fill it with another. So it is that we want a living God, a living Christ, close to us; loving us, forgiving us, helping us, comforting us, and opening before us the prospect of glory and of happiness for eternity. Let us know and feel ourselves able to say, “I know whom I have believed, and am persuaded that He is able to keep that which I have committed unto Him against that day,” and the struggle with inward evil will be simplified, and will become comparatively easy.

3. We stand in daily need of strength and consolation, and for that nothing but a firm and settled faith will suffice. There are great sorrows and great anxieties to which we are all exposed, in the face of which nothing will do for us but sovereign words of life and of hope in which we can implicitly trust. There are great wrongs under which we cannot be comforted except by the constant conviction of a righteousness which will one day vindicate the right, and redress the wrong. There are great losses in which we want the promise and the certainty of an immense and restoring love. Souls will seek this strength, this consolation, here, there, everywhere; but they will never find it until they can say, “I know whom I have believed, and am persuaded that He is able to keep that which I have committed unto Him against that day.”

4. The assurance of faith is necessary to all earnestness of effort in the spread of the gospel. A church or a Christian, subsiding into uncertainty of religious belief, has no motive for zeal in the propagation of religion. We preach because we believe. Let the idea, that the Christianity of Christ or of Paul or of the New Testament needs modification, become prevalent in the professing church, and the secret of every true impulse in missionary work, whether abroad or at home, will be gone. It is the men who share Paul’s stable, grand faith who can take their stand as the preachers of Christ. It is only they who can rise to the sacrifices necessary for the promotion of His truth in the world.

Have we such a faith as this? If not how can we obtain it? This latter question will be best answered by a close adherence to the text. We must say a few words respecting the faith itself, and also respecting Christ, who is the object of it.

What is faith? A common answer is that faith is an act of intellectual submission to the teachings of another—that it is in matters of the mind what blind and unquestioning obedience is in matters of practice. This account of faith was early imposed by the Papal Church, and it is not repudiated even now by some evangelical churches. The root of all doctrines of sacramental efficacy is the renunciation of private judgment in matters of faith. No wonder that with such a definition of faith Christianity should be held in derision, and regarded as the special privilege of the young, the immature, the aged, and all whose weaknesses and disappointments leave them no other consolation and no other resource! This is not the teaching of Scripture. Of course in faith there is submission, for there are many things to be believed which we cannot understand. Nevertheless, faith is much more than submission, and there is not a case of faith in the whole Word of God which presents to us the believing life as a thing of mere blind credulity. Was it so with Abraham, with Job, with David, with Paul, or with any of the others? Even in relation to the dark things, faith rests upon convictions which make submission the only rational, the only possible attitude of the mind. According to Scripture, faith is the soul laying hold of the invisible God—laying hold of Christ as His Son and our Saviour. There is no abdication of any one of the powers of the soul. In believing, the soul is entire with its reason, its thought, its love, and all its spiritual energies. Nor is there any weakness. When a man is hesitating between surrender to the voice of conscience, and surrender to the voice of passion, he performs an act of faith if he yields to the voice of conscience, for he is ruled by the invisible; yet the last thing we dare say of such a man would be that he is weak. Rightly considered, every such act is a triumph of the soul. The conscientious man is the representative of the greatest moral strength we know. Imagine a soul with all its life under the constant thought of God and of Christ. Surely such an order of life as his affords scope enough for intellectual strength and for moral heroism.

Much must be taken for granted, we said. Reason has its sphere, and to it a truly noble task is assigned. The visible world belongs to it, and it is subjecting that world to itself more and more every day. But how powerless it is when man asks of it a response to the aspirations of his conscience and his heart. What can it say to a soul weighed down by a sense of guilt? What to the heart that is torn by calamity? What to any man when death draws nigh? Oh, no! Unless we are to abandon ourselves to despair, there must be faith—some truth in which, or some Being in whom, the whole soul can repose. And mark, this was just the light in which the apostle looked at the matter. He was near the end. Eternity was close before him. He knew that endless issues were at stake. He was nerved to confront it all by faith. What faith? What was he trusting in?