Does anyone have good teaching or insight on Jesus' statement that no sign will be given us except that of Jonah?
 
Luk 11:29     And when the people were gathered thick together, he began to say, This is an evil generation: they seek a sign; and there shall no sign be given it, but the sign of Jonas the prophet.
Luk 11:30     For as Jonas was a sign unto the Ninevites, so shall also the Son of man be to this generation.
 
Joan