 You get that from certain verses, Matthew 4, 17. For example, from that time, Jesus began to preach and say, repent for the kingdom of heaven is at hand. The key here is what the word repent is. In the English and the Greeks, two different words. In the Greek, we have the word metanoeo, and I'll explain it here in a minute. Repent, metanoeo, for the kingdom of heaven is at hand. Why do I say the Greek? Because it was written in the original language