When a thief thinks not to repeat his actions, a liar is determined to act and tell the truth, a murderer thinks what he did is not good and an indifferent person realizes that what he did was not right. It was clear that everyone was thinking of a change.
Changes from within that start from the mind, namely the determination to turn around, then encourage him to no longer do wrong habits that have been ingrained in him.
This is called repentance. Repentance is a state in which a sinner repents of his actions by the Holy Spirit within him. Then he changed his mind, turned from his mistake and turned his mind to God.
The cry of Jesus in Galilee is that the time has come, the Kingdom of God is at hand. Repent and believe in the gospel. The word time has fulfilled means that the presence of Jesus the Nazarene on this earth has fulfilled the prophecies of the prophets about His coming to this world. The kingdom of God is at hand, in fact the Kingdom of God is hic et nunc 'here and now' on the earth that we stand on and now not in heaven later.
That is why we are called to turn, repent and believe in Jesus. Because the Greek word translated Gospel here means Good News. This is the true identity of Jesus. Jesus is good news for this world.
The call for repentance is not only addressed to the big criminals, catfish and mujair but to all of us. Because no human being is perfect. Everything needs to be updated. Everyone needs to repent. Repenting is not just for committing a crime. However, repent because humans most often do not want to do good. This is where the problem is, not being unable to do good but not wanting to, therefore repent.