When Jesus arrived in the Temple courts on Tuesday of Holy Week, he ran into the religious authorities. The chief priests, the teachers of the law, and the elders came up to Jesus and began to question him.
They ganged up on him to put him in his place. They had all the authority in the Temple, or so they thought. The chief priests ran the show. The teachers of the law knew the Bible inside and out. The elders were leaders among their people. Together they could expose this rogue preacher.
They demanded to know where Jesus got his authority. As for them, they could quickly show their own credentials. They had followed the protocol for being religious leaders, being selected as high priests, having studied at Jewish schools, and having taught in synagogues all around. The source of their authority was clear: their connections, education, and followers.
So where did Jesus get his authority? Jesus responded with a curveball. He asked them where John the Baptist got his authority. They could find no satisfactory answer to that question. Rather than acknowledging the truth, that John's baptism was from God, they considered the optics of the possible responses. If they said John was legit, then Jesus would call them out for not believing him. If they said he was not legit, they knew the crowds would be upset.
It looks like the religious posse had no clue about the source of authority for John, Jesus, or themselves. All they could do was read the polls.
Real authority comes from God. Jesus had it, and didn't need to prove it.