When Paul came to the end of the paragraph in which he defends himself from the charge of levity and untrustworthiness by appealing to the nature of the Gospel which he preached, he seems to have felt that it was hardly sufficient for his purpose. It might be perfectly true that the Gospel was one mighty affirmation, with no dubiety or inconsistency about it; it might be as true that it was a supreme testimony to the faithfulness of God; but bad men, or suspicious men, would not admit that its character covered his. Their own insincerities would keep them from understanding its power to change its loyal ministers into its own likeness, and to stamp them with its own simplicity and truth. The mere invention of the argument in vv. 18-20 is of itself the highest possible testimony to the ideal height at which the Apostle lived; no man conscious of duplicity could ever have had it occur to him. But it had the defect of being too good for his purpose; the foolish and the false could see a triumphant reply to it; and he leaves it for a solemn asseveration of the reason which actually kept him from carrying out his first intention. "I call God to witness against my soul, that sparing you I forbore to come[12] to Corinth." The soul is the seat of life; he stakes his life, as it were, in God's sight, upon the truth of his words. It was not consideration for himself, in any selfish spirit, but consideration for them, which explained his change of purpose. If he had carried out his intention, and gone to Corinth, he would have had to do so, as he says in 1 Cor. iv. 21, with a rod, and this would not have been pleasant either for him or for them. This is very plain--plain even to the dullest; the Apostle has no sooner set it down than he feels it is too plain. "To spare us," he hears the Corinthians say to themselves as they read: "who is he that he should take this tone in speaking to us?" And so he hastens to anticipate and deprecate their touchy criticism: "Not that we lord it over your faith, but we are helpers of your joy; as far as faith is concerned, your position, of course, is secure."