Did Jesus really rise from the dead?

¹⁷Now the LORD had appointed a great fish to swallow Jonah, and Jonah spent three days and three nights in the belly of the fish.

¹Now, brothers, I want to remind you of the gospel I preached to you, which you received, and in which you stand firm. ²By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain. ³For what I received I passed on to you as of first importance: that Christ died for our sins according to the Scriptures, ⁴that He was buried, that He was raised on the third day according to the Scriptures, ⁵and that He appeared to Cephas and then to the Twelve. ⁶After that, He appeared to more than five hundred brothers at once, most of whom are still living, though some have fallen asleep. ⁷Then He appeared to James, then to all the apostles. ⁸And last of all He appeared to me also, as to one of untimely birth. ⁹For I am the least of the apostles and am unworthy to be called an apostle, because I persecuted the church of God. ¹⁰But by the grace of God I am what I am, and His grace to me was not in vain. No, I worked harder than all of them—yet not I, but the grace of God that was with me. ¹¹Whether, then, it was I or they, this is what we preach, and this is what you believed. ¹²But if it is preached that Christ has been raised from the dead, how can some of you say that there is no resurrection of the dead? ¹³If there is no resurrection of the dead, then not even Christ has been raised. ¹⁴And if Christ has not been raised, our preaching is worthless, and so is your faith. ¹⁵In that case, we are also exposed as false witnesses about God. For we have testified about God that He raised Christ from the dead, but He did not raise Him if in fact the dead are not raised. ¹⁶For if the dead are not raised, then not even Christ has been raised. ¹⁷And if Christ has not been raised, your faith is futile; you are still in your sins. ¹⁸Then those also who have fallen asleep in Christ have perished. ¹⁹If our hope in Christ is for this life alone, we are to be pitied more than all men. ²⁰But Christ has indeed been raised from the dead, the firstfruits of those who have fallen asleep. ²¹For since death came through a man, the resurrection of the dead comes also through a man. ²²For as in Adam all die, so in Christ all will be made alive.