If "power" and the "Holy Ghost" are in some degree to be judged only by their effects, there can be no question that "much assurance," on the other hand, is an inner experience, belonging strictly to the self-consciousness of the preacher. It means a full and strong conviction of the truth of the gospel. We can only understand this by contrast with its opposite; "much assurance" is the counterpart of misgiving or doubt. We can hardly imagine an apostle in doubt about the gospel--not quite certain that Christ had risen from the dead; wondering whether, after all, His death had abolished sin. Yet these truths, which are the sum and substance of the gospel, seem, at times, too great for belief; they do not coalesce with the other contents of our mind; they do not weave easily into one piece with the warp and woof of our common thoughts; there is no common measure for them and the rest of our experience, and the shadow of unreality falls upon them. They are so great that it needs a certain greatness to answer to them, a certain boldness of faith to which even a true Christian may feel momentarily unequal; and while he is unequal, he cannot do the work of an evangelist. Doubt paralyses; God cannot work through a man in whose soul there are misgivings about the truth. At least, His working will be limited to the sphere of what is certain for him through whom He works; and if we would be effective ministers of the word, we must speak only what we are sure of, and seek the full assurance of the whole truth. No doubt such assurance has conditions. Unfaithfulness of one kind or another is, as our Lord teaches (John vii. 17), the source of uncertainty as to the truth of His word; and prayer, repentance, and obedience due, the way to certainty again. But Paul had never been more confident of the truth and power of his gospel than when he came to Thessalonica. He had seen it proved in Philippi, in conversions so dissimilar as those of Lydia and the jailor. He had felt it in his own heart, in the songs which God had given him in the night while he suffered for Christ's sake. He came among those whom he addresses confident that it was God's instrument to save all who believed. This is his last personal reason for believing the Thessalonians to be elect.
Strictly speaking, all this refers rather to the delivery of the message than to the messengers, to the preaching than to the preachers; but the Apostle applies it to the latter also. "Ye know," he writes, "what manner of men we showed ourselves toward you for your sakes." I venture to think[2] that the word rendered "we showed ourselves" has really the passive sense--"what God enabled us to be"; it is God's good will to the Thessalonians which is in view, and the Apostle infers that good will from the character which God enabled him and his friends to sustain for their sakes. Who could deny that God had chosen them, when He had sent them Paul and Silas and Timothy; not mere talkers, cold and spiritless, and dubious of their message; but men strong in spiritual force, in holy fervour, and in their grasp of the gospel? If that did not go to show that the Thessalonians were elect, what could?
II. The self-consciousness of the preachers, however, significant as it was, was no conclusive evidence. It only became such when their inspiration was caught by those who listened to them; and this was the case at Thessalonica. "Ye became imitators of us and of the Lord, having received the word in much affliction, with joy of the Holy Ghost." This peculiar expression implies that the signs of God's election were to be seen in the evangelists, and eminently in the Lord. Paul shrinks from making himself and his companions types of the elect, without more ado; they are such only because they are like Him, of whom it is written "Behold my servant whom I uphold; Mine elect, in whom My soul delighteth." He speaks here in the same strain as in 1 Cor. xi. 1: "Brethren, be ye imitators of me, even as I also am of Christ." They who have become like the Lord are marked out as the chosen of God.