Sermon: Luke 11:29-36 - The Only Sign for a Wicked Generation. After Jesus cast a demon out a man, some onlookers were seeking a sign from heaven to verify that He was indeed the Messiah. This group of skeptics seemed well-intentioned enough, wanting to see more evidence for Jesus' claims, yet Jesus issued His most scathing rebuke against them, promising them only one sign: the sign of Jonah. What is this sign? And how does it relate to Jesus? Listen to this week's sermon as we look at Luke 11:29-36 and Jesus' words to skeptics.