John Sung delivers a poignant sermon titled 'A Christian in Hell,' exploring the parable of the rich man and Lazarus from Luke 16:19-31. He emphasizes the tragic fate of the rich man who, despite his earthly wealth and pleasures, finds himself in torment after death, realizing too late the importance of spiritual preparation. Sung urges listeners to reflect on their lives and priorities, warning against the dangers of neglecting eternal matters for temporary pleasures. He highlights the futility of seeking comfort in hell and the necessity of turning to God while there is still time. The sermon serves as a powerful reminder to prepare for eternity and to heed the call of salvation before it is too late.