In short
Jesus started his public ministry with preaching. The Greek word kérussein
literally refers to the proclamation of a herald
—in this case, a public call to repentance.
He preached. The Greek word translated preach
—kérussein—literally means the proclamation of a herald.
1 The preaching here is public in nature, and the content of the message centers around the call to repentance.2
17 From that time Jesus began to preach, saying, “Repent, for the kingdom of heaven is at hand.”