"You yourselves bear me witness, that I said, 'I am not the Christ, but I have been sent before him.' The one who has the bride is the bridegroom. The friend of the bridegroom, who stands and hears him, rejoices greatly at the bridegroom's voice. Therefore this joy of mine is now complete. He must increase, I must decrease." (John 3:28-30, ESV)
It takes but a moment in reading the Apostle John's gospel account to get a sense of what motivated John the Baptist - to get a sense of this man's heart. In John 3 we read of John the Baptist making his mission crystal clear. He understands his life's calling to be one that testifies to Jesus. His was born to show the world who Jesus is and why he has come.