For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, that he was buried, that he was raised on the third day in accordance with the Scriptures, and that he appeared to Cephas, then to the twelve. Then he appeared to more than five hundred brothers at one time, most of whom are still alive, though some have fallen asleep.
Then he appeared to James, then to all the apostles. Last of all, as to one untimely born, he appeared also to me. For I am the least of the apostles, unworthy to be called an apostle, because I persecuted the church of God. But by the grace of God I am what I am, and his grace toward me was not in vain. On the contrary, I worked harder than any of them, though it was not I, but the grace of God that is with me. Whether then it was I or they, so we preach and so you believed. Now if Christ is proclaimed as raised from the dead, how can some of you say that there is no resurrection of the dead? But if there is no resurrection of the dead, then not even Christ has been raised. And if Christ has not been raised, then our preaching is in vain and your faith is in vain. We are even found to be misrepresenting God, because we testified about God that he raised Christ, whom he did not raise if it is true that the dead are not raised. For if the dead are not raised, not even Christ has been raised. And if Christ has not been raised, your faith is futile and you are still in your sins. Then those also who have fallen asleep in Christ have perished. If in Christ we have hope in this life only, we are of all people most to be pitied. But in fact Christ has been raised from the dead, the firstfruits of those who have fallen asleep.
Otherwise, what do people mean by being baptized on behalf of the dead? If the dead are not raised at all, why are people baptized on their behalf? Why are we in danger every hour? I protest, brothers, by my pride in you, which I have in Christ Jesus our Lord, I die every day! What do I gain if, humanly speaking, I fought with beasts at Ephesus? If the dead are not raised, “Let us eat and drink, for tomorrow we die.” I tell you this, brothers: flesh and blood cannot inherit the kingdom of God, nor does the perishable inherit the imperishable. Behold! I tell you a mystery. We shall not all sleep, but we shall all be changed, in a moment, in the twinkling of an eye, at the last trumpet. For the trumpet will sound, and the dead will be raised imperishable, and we shall be changed. For this perishable body must put on the imperishable, and this mortal body must put on immortality. When the perishable puts on the imperishable, and the mortal puts on immortality, then shall come to pass the saying that is written: “Death is swallowed up in victory.” “O death, where is your victory? O death, where is your sting?” The sting of death is sin, and the power of sin is the law. But thanks be to God, who gives us the victory through our Lord Jesus Christ. Therefore, my beloved brothers, be steadfast, immovable, always abounding in the work of the Lord, knowing that in the Lord your labor is not in vain. - 1 Corinthians 15:3-20, 29-32, 50-58 ESV
Rev. Dwight Yoo
The Resurrection is the heart of Christianity. Without it, we have no New Testament. There was doubt, even those days, that Jesus rose for the dead.
Paul presents the case that Jesus rose from the dead. Jesus showed himself to five hundred people.
Changed Person
If Christ is not raised, then we are still in our sins. Dead people just stay dead. We are misrepresenting God. All the things we do: prayer, worship, fasting... is useless and ridiculous. Missionaries are to be pitied. There is nothing after the grave. There is nothing more than eating, drinking, and tomorrow we die (epicureanism). But Christ has risen. He is the firstfruit of things to come. He was bodily resurrected. But it was a glorious body... That walks through walls. The essence is the same, yet so much better. So it will be with us, we will be ourselves, yet much, much more gloriously so. The power that raised Christ from the dead is the same power at work in believers. We are new creations. We are being freed from our sins and idols. Christ guarantees that we can and will conquer.
Changed Purpose
In Christ, our work is not in vain. Our work in this life has eternal impact. Don't waste it on inconsequential things. There is a form of continuity from this life to the next. When you truly labor for God and His kingdom, it will not be in vain. The smallest details of our lives that we strive to live for the glory of God, it will bring us joy in eternity. The suffering of this life for Christ will have profound meaning in eternity.
Death is not natural. Saying goodbye to people is not how things should be. Atheists may consider death part of the cycle of life, but God meant us to live with Him eternally. We were created for eternity, not death.
The church should display the new heaven and the new earth. No racism. No class-ism. The divisions that will disappear in heaven... have no place in church. We are a model home displaying the future glory of our heavenly home.