His scathing judgment in his contemporary generation

^29-32 Then as the people crowded closely around him, he continued, “This is an evil generation! It looks for a sign and it will be given no sign except that of Jonah. Just as Jonah was a sign to the people of Nineveh, so will the Son of Man be a sign to this generation. When the judgment comes, the Queen of the South will rise up with the men of this generation and she will condemn them. For she came from the ends of the earth to listen to the wisdom of Solomon, and there is more than the wisdom of Solomon with you now! The men of Nineveh will stand up at the judgment with this generation and will condemn it. For they did repent when Jonah preached to them, and there is something more than Jonah’s preaching with you now!”

The need for complete sincerity

³³ “No one takes a lamp and puts it in a cupboard or under a bucket, but on a lamp-stand, so that those who come in can see the light.”