The authority of Jesus questioned

Matthew 21:23-27
The authority of Jesus questioned: Jesus did not directly reply the chief priests and the elders question, but Jesus asked them where did John's baptism come from? and was it from heaven, or from men?
The question asked by the chief priests and elders is natural, in the light of what has happened.
In the three parables that follow, his critics find themselves under fire.
Why?
Jesus makes no direct answer, but it is clear that he and John derive their authority from the same source.
Jesus is wise and smart to send back the question to them, even he says his authority drives from heaven, then won't believe Him. They don't believe in John so they won't believe in Jesus neither.
Answer question need to care what they care about? Do they really want my answer or just try to find some evidence to attack me?
How?
Jesus has authority from heaven, but not from men. So He is the Lord, my Savior and my hope!