Luke 3:7-9
7 When crowds of people came out for baptism because it was the popular thing to do, John exploded: "Brood of snakes! What do you think you're doing slithering down here to the river? Do you think a little water on your snakeskins is going to deflect God's judgment? 8 It's your life that must change, not your skin. And don't think you can pull rank by claiming Abraham as 'father.' Being a child of Abraham is neither here nor there — children of Abraham are a dime a dozen. God can make children from stones if he wants. 9 What counts is your life. Is it green and blossoming? Because if it's deadwood, it goes on the fire."

Being a Christian is the popular thing to do now but John’s comments haven’t changed one bit: It's your life that must change!