Mathew 3:1-2

In those days John the Baptist appeared, preaching in the Wilderness of Judea and saying. Repent (change your inner self- your old way of thinking, regret past sins, live your life in a way that proves repentance; seek God’s purpose for your life), for the kingdom of heaven is at hand. 

The message hasn’t changed of turning from sin and turning to God. Many generations of people have come and gone, and still, God through Jesus reaches out with the message of salvation. The kingdom of heaven is at hand, and when we live a life of repentance, we find God’s purpose for our life.