In this verse we have the improvement of the whole argument, in an exhortation, enforced by a motive resulting plainly from it. I. An exhortation, and this threefold: - 1. That they should be stedfast - hedraioi, firm, fixed in the faith of the gospel, that gospel which he had preached and they had received, namely, That Christ died for our sins, and arose again the third day, according to the scriptures (Co1 15:3, Co1 15:4), and fixed in the faith of the glorious resurrection of the dead, which, as he had shown, had so near and necessary a connection with the former. "Do not let your belief of these truths be shaken or staggered. They are most certain, and of the last importance." Note, Christians should be stedfast believers of this great article of the resurrection of the dead. It is evidently founded on the death of Christ. Because he lives, his servants shall live also, Joh 14:19. And it is of the last importance; a disbelief of a future life will open a way to all manner of licentiousness, and corrupt men's morals to the last degree. It will be easy and natural to infer hence that we may live like beasts, and eat and drink, for tomorrow we die. 2. He exhorts them to be immovable, namely, in their expectation of this great privilege of being raised incorruptible and immortal. Christians should not be moved away from this hope of this gospel (Col 1:23), this glorious and blessed hope; they should not renounce nor resign their comfortable expectations. They are not vain, but solid hopes, built upon sure foundations, the purchase and power of their risen Saviour, and the promise of God, to whom it is impossible to lie - hopes that shall be their most powerful supports under all the pressures of life, the most effectual antidotes against the fears of death, and the most quickening motives to diligence and perseverance in Christian duty. Should they part with these hopes? Should they suffer them to be shaken? Note, Christians should live in the most firm expectation of a blessed resurrection. This hope should be an anchor to their souls, firm and sure, Heb 6:19. 3. He exhorts them to abound in the work of the Lord, and that always, in the Lord's service, in obeying the Lord's commands. They should be diligent and persevering herein, and going on towards perfection; they should be continually making advances in true piety, and ready and apt for every good work. The most cheerful duty, the greatest diligence, the most constant perseverance, become those who have such glorious hopes. Can we too much abound in zeal and diligence in the Lord's work, when we are assured of such abundant recompences in a future life? What vigour and resolution, what constancy and patience, should those hopes inspire! Note, Christians should not stint themselves as to their growth in holiness, but be always improving in sound religion, and abounding in the work of the Lord. II. The motive resulting from the former discourse is that their labour shall not be in vain in the Lord; nay, they know it shall not. They have the best grounds in the world to build upon: they have all the assurance that can rationally be expected: as surely as Christ is risen, they shall rise; and Christ is as surely risen as the scriptures are true, and the word of God. The apostles saw him after his death, testified this truth to the world in the face of a thousand deaths and dangers, and confirmed it by miraculous powers received from him. Is there any room to doubt a fact so well attested? Note, True Christians have undoubted evidence that their labour will not be in vain in the Lord; not their most diligent services, nor their most painful sufferings; they will not be in vain, not be vain and unprofitable. Note, The labour of Christians will not be lost labour; they may lose for God, but they will lose nothing by him; nay, there is more implied than is expressed in this phrase: it means that they shall be abundantly rewarded. He will never be found unjust to forget their labour of love, Heb 6:10. Nay, he will do exceedingly abundantly above what they can now ask or think. Neither the services they do for him, nor the sufferings they endure for him here, are worthy to be compared with the joy hereafter to be revealed in them, Rom 8:18. Note, Those who serve God have good wages; they cannot do too much nor suffer too much for so good a Master. If they serve him now, they shall see him hereafter; if they suffer for him on earth, they shall reign with him in heaven; if they die for his sake, they shall rise again from the dead, be crowned with glory, honour, and immortality, and inherit eternal life.