Jesus said to them, “I will ask you one question; answer me, and I will tell you by what authority I do these things.
We have here Christ examined by the great Sanhedrim concerning his authority; for they claimed a power to call prophets to an account concerning their mission. They came to him when he was walking in the temple, not for his diversion, but teaching the people, first one company and then another. The Peripatetic philosophers were so called from the custom they had of walking when they taught.
Commenting on Mark 11:27-33
The baptism of John,.... The doctrine of which he was the first preacher, and the ordinance of which he was the first administrator: was it from heaven, or of men? was it of divine or of human institution? answer me; directly and plainly, without any shuffling, or evasion: it is a fair question, and may be answered; and the answer to it our Lord suggests...
Verse 29. (1) "one question" or "one thing"