Back at His hometown of Nazareth, the people can't believe their Jesus could do such things, so He does little.
Jesus sends the disciples out on their own, to heal, exorcise and preach. They are to be supported by those who receive them.
This makes Jesus more famous, and Herod hears of it. He thinks John the Baptist is back from the dead haunting him. He has a guilty conscience from having John beheaded after showing off his daughter in front of his state leaders and cabinet.
Sins this reveals
Rejecting or devaluing Jesus for petty reasons.
Not trusting God to provide while we are doing His work.
Showing off things we shouldn't.
Making rash promises while in the grip of lust.
Holding resentment and seeking revenge against people who point out our sins.