On His way to Jerusalem
Jesus points to Jonah's sign; Nineveh repents! Jesus says don't let complacency rule your life (where sin harms our insight), but let Jesus transform your eyesight. Remember Jonah is believed and Jesus is rejected.
Don't be fickle and half hearted but be like the people of Nineveh and Queen of the South.
PS: Luke 11:28 says pay attention, listen and obey