1 Corinthians 15:1-2New International Version (NIV)
The Resurrection of Christ
15 Now, brothers and sisters, I want to remind you of the gospel I preached to you, which you received and on which you have taken your stand. 2 By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.
Paul is saying clearly that belief can end up in vain
The Resurrection of Christ
15 Now, brothers and sisters, I want to remind you of the gospel I preached to you, which you received and on which you have taken your stand. 2 By this gospel you are saved, if you hold firmly to the word I preached to you. Otherwise, you have believed in vain.
Paul is saying clearly that belief can end up in vain