Paul emphasises his appeal to the Corinthians by a striking quotation from an ancient prophet (Isa. xlix. 8): "At an acceptable time did I hearken unto thee, And in a day of salvation did I succour thee"; and he points it by the joyful exclamation: "Behold, now is the acceptable time; behold, now is the day of salvation." The passage in Isaiah refers to the servant of Jehovah, and some scholars would insist that even in the quotation a primary application must be made to Christ. The ambassadors of the Gospel represent _His_ interest (chap. v. 20); this verse is, as it were, the answer to _His_ prayer: "Father, the hour is come: glorify Thy Son." In answering the Son, the Father introduces the era of grace for all who are, or shall be, Christ's: behold, now is the time in which God shows us favour; now is the day on which He saves us. This is rather scholastic than apostolic, and it is far more probable that St. Paul borrows the prophet's words, as he often does, because they suit him, without thinking of their original application. What is striking in the passage, and characteristic both of the writer and of the New Testament, is the union of urgency and triumph in the tone. "Now" does certainly mean "now or never"; but more prominently still it means "in a time so favoured as this: in a time so graced with opportunity." The best illustration of it is the saying of Jesus to the Apostles: "Blessed are your eyes, for they see; and your ears, for they hear. For verily I say unto you, That many prophets and righteous men have desired to see those things which ye see, and have not seen them; and to hear those things which ye hear, and have not heard them." _Now_, that we live under the reign of grace; _now_, when God's redeeming love, omnipotent to save, shines on us from the Cross; _now_, that the last days have come, and the Judge is at the door, let us with all seriousness, and all joy, work out our own salvation, lest we make the grace of God of no effect.
St. Paul is as careful himself as he would have the Corinthians to be. He does not wish them to receive the Gospel in vain, and he takes pains that it shall not be frustrated through any fault of his: "working together with God we intreat you ... giving no occasion of stumbling in anything, that our ministration be not blamed." It is almost implied in a sentence like this that there are people who will be glad of an excuse not to listen to the Gospel, or not to take it seriously, and that they will look for such an excuse in the conduct of its ministers. Anything in the minister to which objection can be raised will be used as a shield against the Gospel. It does not matter that in nine cases out of ten this plea for declining the grace of God is impudent hypocrisy; it is one which the non-Christian should never have. If it is not the chief end of the evangelist to give no occasion of stumbling, it is one of his chief rules. This is a matter on which Jesus lays great stress. The severest words He ever spoke were spoken against those whose conduct made faith hard and unbelief easy. Of course they were spoken to all, but they have special application to those who are so directly identified with the Gospel as its ministers. It is to them men naturally look for the proof of what grace does. If its reception has been in vain in them; if they have not learned the spirit of their message; if their pride, or indolence, or avarice, or ill-nature, provoke the anger or contempt of those to whom they preach,--then their ministration is blamed, and the shadow of that censure falls upon their message. The grace of God which has to be proclaimed through human lips, and to attest itself by its power over human lives, might seem to be put in this way to too great hazard in the world; but it has God behind it, or rather it is itself God at work in His ministers as their humility and fidelity allow Him; and in spite of the occasions of stumbling for which there is no excuse, God is always able to make grace prevail. Through the faults of its ministers, nay, sometimes even with those faults as a foil, men see how good and how strong that grace is.