Jesus preached a message of repentance.
When Jesus heard that John had been put in prison, he withdrew to Galilee. From that time on Jesus began to preach, “Repent, for the kingdom of heaven has come near.” Matthew 4:12, 17 NIV
And,
…an expert in the law, tested him with this question: “Teacher, which is the greatest commandment in the Law?” Jesus replied: “ ‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ And the second is like it: ‘Love your neighbor as yourself.’ All the Law and the Prophets hang on these two commandments.” Matthew 22:35-37, 39-40 NIV
Jesus’ disciples, also, affirmed,
Peter replied, “Repent and be baptized, every one of you, in the name of Jesus Christ for the forgiveness of your sins. And you will receive the gift of the Holy Spirit. The promise is for you and your children and for all who are far off—for all whom the Lord our God will call.” Acts 2:38-39 NIV
But sometimes, when instructed we ignore, like Jonah,
But Jonah ran away from the Lord and headed for Tarshish. He went down to Joppa, where he found a ship bound for that port. After paying the fare, he went aboard and sailed for Tarshish to flee from the Lord . Then the Lord sent a great wind on the sea, and such a violent storm arose that the ship threatened to break up. All the sailors were afraid and each cried out to his own god. And they threw the cargo into the sea to lighten the ship. But Jonah had gone below deck, where he lay down and fell into a deep sleep. The captain went to him and said, “How can you sleep? Get up and call on your god! Maybe he will take notice of us so that we will not perish.” So, they asked him, “Tell us, who is responsible for making all this trouble for us? What kind of work do you do? Where do you come from? What is your country? From what people are you?” He answered, “I am a Hebrew and I worship the Lord, the God of heaven, who made the sea and the dry land.” The sea was getting rougher and rougher. So they asked him, “What should we do to you to make the sea calm down for us?” “Pick me up and throw me into the sea,” he replied, “and it will become calm. I know that it is my fault that this great storm has come upon you.” Then they took Jonah and threw him overboard, and the raging sea grew calm. At this the men greatly feared the Lord, and they offered a sacrifice to the Lord and made vows to him. Now the Lord provided a huge fish to swallow Jonah, and Jonah was in the belly of the fish three days and three nights. Jonah 1:3-6, 8-9, 11-12, 15-17 NIV
And so,
(They) hurled me (Jonah)into the depths, into the very heart of the seas, and the currents swirled about me; all your waves and breakers swept over me. I said, ‘I have been banished from your sight; yet I will look again toward your holy temple.’ “When my life was ebbing away, I remembered you, Lord, and my prayer rose to you, to your holy temple. But I, with shouts of grateful praise, will sacrifice to you. What I have vowed I will make good. I will say, ‘Salvation comes from the Lord.’ ” And the Lord commanded the fish, and it vomited Jonah onto dry land. Jonah 2:3-4, 7, 9-10 NIV
Now,
I tell you that something greater than the temple is here. If you had known what these words mean, ‘I desire mercy, not sacrifice,’ you would not have condemned the innocent. For the Son of Man is Lord of the Sabbath.” Jesus knew their thoughts and said to them, “Every kingdom divided against itself will be ruined, and every city or household divided against itself will not stand. If Satan drives out Satan, he is divided against himself. How then can his kingdom stand? “Whoever is not with me is against me, and whoever does not gather with me scatters. And so, I tell you, every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven. For by your words, you will be acquitted, and by your words you will be condemned.” Then some of the Pharisees and teachers of the law said to him, “Teacher, we want to see a sign from you.” He answered, “A wicked and adulterous generation asks for a sign! But none will be given it except the sign of the prophet Jonah. For as Jonah was three days and three nights in the belly of a huge fish, so the Son of Man will be three days and three nights in the heart of the earth. The men of Nineveh will stand up at the judgment with this generation and condemn it; for they repented at the preaching of Jonah, and now something greater than Jonah is here.
The Ninevites believed God. A fast was proclaimed, and all of them, from the greatest to the least, put on sackcloth. When Jonah’s warning reached the king of Nineveh, he rose from his throne, took off his royal robes, covered himself with sackcloth and sat down in the dust. But let people and animals be covered with sackcloth. Let everyone call urgently on God. Let them give up their evil ways and their violence. Who knows? God may yet relent and with compassion turn from his fierce anger so that we will not perish.” When God saw what they did and how they turned from their evil ways, he relented and did not bring on them the destruction he had threatened. Jonah 3:5-6, 8-10 NIV
Understand this,
“When an impure spirit comes out of a person, it goes through arid places seeking rest and does not find it. Then it says, ‘I will return to the house I left.’ When it arrives, it finds the house unoccupied, swept clean and put in order. Then it goes and takes with it seven other spirits more wicked than itself, and they go in and live there. And the final condition of that person is worse than the first. That is how it will be with this wicked generation.”
While Jesus was still talking to the crowd, his mother and brothers stood outside, wanting to speak to him. Someone told him, “Your mother and brothers are standing outside, wanting to speak to you.” He replied to him, “Who is my mother, and who are my brothers?” Pointing to his disciples, he said, “Here are my mother and my brothers. For whoever does the will of my Father in heaven is my brother and sister and mother.” Matthew 12:6-8, 25-26, 30-31, 37-50 NIV