If you cannot argue for the gospel with learning, nor from experience, what will ye do in an hour of temptation? For the most part, christians are too little bred up to those methods of knowledge, whereby they might be capable of giving large, and rational, and satisfactory answers to those that may set themselves to oppose the truth and progress of the gospel. What will you do in the darkness of such a temptation, when those that are learned and ingenious shall attack your faith, and say, “Why do you believe in Jesus?” If you have this answer ready at hand, “I have found the efficacy and power of the gospel on my heart;” this will be sufficient to answer all their cavils. It was one way whereby christianity was confirmed in the hearts of the martyrs of old, and whereby they were enabled to bear up against all oppositions, because they found such a divine efficacy attending the gospel, such a new and heavenly life wrought in them, as enabled them to go through great hardships for the sake of Christ. But this leads me to, 4. The fourth remark, _viz._ If there be this inward evidence belonging to the gospel, and those that truly believe, then you have a strong encouragement to profess christianity under the greatest persecutions. It will bear you out, it carries its own evidence with it; christianity in the heart will give courage against temptation. _Think it not strange concerning the fiery trial_, says the apostle Peter, for in such a fiery trial the gospel hath secured thousands; therefore, says St. Paul, though I meet with reproaches wheresoever I go, _though bonds and imprisonments await me_, and death itself; Acts xx. 23. _yet I am not ashamed of the gospel of Christ_; Rom. i. 16. _for it is the power of God to salvation, to every one that believeth_. Which is but the sense of my text in other words. Every one that believes it in truth, hath this evidence in _himself, even eternal life: Therefore I count not my life dear to me, &c._ for the gospel will bear me out in my profession of it, in my publication of it, and in my suffering for it. This is the way we shall learn _to resist unto blood_, and seal the truth of this gospel with our mortal lives, if we have the seal of this truth abiding in our souls.