This newness and originality of Christianity could not fail to impress those who first received it. The gospel made an immeasurable difference to them, a difference almost equally great whether they had been Jews or heathen before; and they were intensely conscious of the gulf which separated their new life from the old. In another epistle Paul describes the condition of Gentiles not yet evangelised. Once, he says, you were apart from Christ, without God, in the world. The world – the great system of things and interests separated from God – was the sphere and element of their life. The gospel found them there, and translated them. When they received it, they ceased to be in the world; they were no longer apart from Christ, and without God: they were in God the Father and in the Lord Jesus Christ. Nothing could be more revolutionary in those days than to become a Christian: old things passed away; all things became new; all things were determined by the new relation to God and His Son. The difference between the Christian and the non-Christian was as unmistakable and as clear to the Christian mind as the difference between the shipwrecked sailor who has reached the shore and him who is still fighting a hopeless fight with wind and waves. In a country which has long been Christian, that difference tends, to sense at least, and to imagination, to disappear. We are not vividly impressed with the distinction between those who claim to be Christians and those who do not; we do not see a radical unlikeness, and we are sometimes disposed to deny it. We may even feel that we are bound to deny it, were it only in justice to God. He has made all men for Himself; He is the Father of all; He is near to all, even when they are blind to Him; the pressure of His hand is felt and in a measure responded to by all, even when they do not recognise it; to say that any one is ἄθεος, or χωρὶς Χριστοῦ, or that he is not in God the Father and in the Lord Jesus Christ, seems really to deny both God and man.
Yet what is at issue here is really a question of fact; and among those who have been in contact with the facts, among those, above all, who have had experience of the critical fact – who once were not Christians and now are – there will not be two opinions about it. The difference between the Christian and the non-Christian, though historical accidents have made it less visible, or rather, less conspicuous than it once was, is still as real and as vast as ever. The higher nature of man, intellectual and spiritual, must always have an element in which it lives, an atmosphere surrounding it, principles to guide it, ends to stimulate its action; and it may find all these in either of two places. It may find them in the world – that is, in that sphere of things from which God, so far as man's will and intent goes, is excluded; or it may find them in God Himself and in His Son. It is no objection to this division to say that God cannot be excluded from His own world, that He is always at work there whether acknowledged or not; for the acknowledgment is the essential point; without it, though God is near to man, man is still far from God. Nothing could be a more hopeless symptom in character than the benevolent neutrality which evades this truth; it takes away every motive to evangelise the non-Christian, or to work out the originality and distinctiveness of the Christian life itself. Now, as in the apostolic age, there are persons who are Christians and persons who are not; and, however alike their lives may be on the surface, they are radically apart. Their centre is different; the element in which they move is different; the nutriment of thought, the fountain of motives, the standard of purity are different; they are related to each other as life in God, and life without God; life in Christ, and life apart from Christ; and in proportion to their sincerity is their mutual antagonism.
In Thessalonica the Christian life was original enough to have formed a new society. In those days, and in the Roman Empire, there was not much room for the social instincts to expand. Unions of all kinds were suspected by the governments, and discouraged, as probable centres of political disaffection. Local self-government ceased to be interesting when all important interests were withdrawn from its control; and even had it been otherwise, there was no part in it possible for that great mass of population from which the Church was so largely recruited, namely, the slaves. Any power that could bring men together, that could touch them deeply, and give them a common interest that engaged their hearts and bound them to each other, met the greatest want of the time, and was sure of a welcome. Such a power was the gospel preached by Paul. It formed little communities of men and women wherever it was proclaimed; communities in which there was no law but that of love, in which heart opened to heart as nowhere else in all the world, in which there was fervour and hope and freedom and brotherly kindness, and all that makes life good and dear. We feel this very strongly in reading the New Testament, and it is one of the points on which, unhappily, we have drifted away from the primitive model. The Christian congregation is not now, in point of fact, the type of a sociable community. Too often it is oppressed with constraint and formality. Take any particular member of any particular congregation; and his social circle, the company of friends in which he expands most freely and happily, will possibly have no connection with those he sits beside in the church. The power of the faith to bring men into real unity with each other is not lessened; we see this wherever the gospel breaks ground in a heathen country, or wherever the frigidity of the church drives two or three fervent souls to form a secret society of their own, but the temperature of faith itself is lowered; we are not really living, with any intensity of life, in God the Father and in the Lord Jesus Christ. If we were, we would be drawn closer to each other; our hearts would touch and overflow; the place where we meet in the name of Jesus would be the most radiant and sociable place we know.
Nothing could better illustrate the reality of that new character which Christianity confers than the fact that men can be addressed as Christians. Nothing, either, could better illustrate the confusion of mind that exists in this matter, or the insincerity of much profession, than the fact that so many members of churches would hesitate before taking the liberty so to address a brother. We have all written letters, and on all sorts of occasions; we have addressed men as lawyers, or doctors, or men of business; we have sent or accepted invitations to gatherings where nothing would have astonished us more than the unaffected naming of the name of God; did we ever write to anybody because he was a Christian, and because we were Christians? Of all the relations in which we stand to others, is that which is established by "our common Christianity," by our common life in Jesus Christ, the only one which is so crazy and precarious that it can never be really used for anything? Here we see the Apostle look back from Corinth to Thessalonica, and his one interest in the poor people whom he remembers so affectionately is that they are Christians. The one thing in which he wishes to help them is their Christian life. He does not care much whether they are well or ill off in respect of this world's goods; but he is anxious to supply what is lacking in their faith (iii. 10). How real a thing the Christian life was to him! what a substantial interest, whether in himself or in others, engrossing all his thought, absorbing all his love and devotion. To many of us it is the one topic for silence; to him it was the one theme of thought and speech. He wrote about it, as he spoke about it, as though there were no other interest for man; and letters like those of Thomas Erskine show that still, out of the abundance of the heart, the mouth speaketh. The full soul overflows, unaffected, unforced; Christian fellowship, as soon as Christian life is real, is restored to its true place.
Paul, Silas, and Timothy wish the church of the Thessalonians grace and peace. This is the greeting in all the Apostle's letters; it is not varied except by the addition of "mercy" in the Epistles to Timothy and Titus. In form it seems to combine the salutations current among the Greeks and the Jews (χαίρειν and שָׁלוֹם), but in import it has all the originality of the Christian faith. In the second Epistle it runs, "Grace and peace