The Apostle Paul's words in 1 Corinthians 15:32 express how absurd life would be if Christ had not raised from the dead. Christ's resurrection from the dead entails the existence of an all-powerful, all-knowing, everywhere-present, all-good God. Although Camus' philosophy was bleak, it was an honest attempt to trace out the ultimate implications of his atheism. Paul's point in 1 Corinthians 15:32 is to show that if God did not exist, then the only alternative would be to "eat, drink and be merry, for tomorrow we die". Unless God exists, there is no basis for meaning, value, purpose and truth.
An important clarifying point
How we must have an "upper story" in order to have value, meaning, purpose and truth in this "lower story" world
Concerning Paul's comments, the Bible Knowledge Commentary notes:
"Why face that if this life were all there is? The Epicureans (and less philosophical men before them; cf. Isa. 22:13) would be right—pursue pleasure and avoid pain (cf. Epicurus Letter to Menoeceus 128). But Paul knew there was more, and his life testified to that fact (cf. 1 Cor. 9:24–27; 2 Cor. 4:16–18)."
The people in Paul's remarks lived their lives as if there were no God. On their viewpoints (which would correspond to Atheism today), since there is no God nor God to regard, then there is no purpose, no value and no meaning to life. Worldviews that deny God and the resurrection of Jesus from the dead have no basis for which to assert the value, meaning and purpose of human life.
Tomorrow we will continue on by considering further this argument. For now, let's keep in mind that value, meaning, purpose and truth are impossible without God's existence and more specifically, withough the resurrection of Jesus from the dead.