Mark 11:27 And they come again to Jerusalem: and as he was walking in the temple, there come to him the chief priests, and the scribes, and the elders,
All the highest authority of the religious system came to him, but not seeing Jesus as their Lord. In the church, Jesus is the head and the Lord of all.
Mark 11:28 And say unto him, By what authority doest thou these things? and who gave thee this authority to do these things?
By the authority of God His Father he did all things.
John 15:23 He that hateth me hateth my Father also.
John 15:24 If I had not done among them the works which none other man did, they had not had sin: but now have they both seen and hated both me and my Father.
Mark 11:29 And Jesus answered and said unto them, I will also ask of you one question, and answer me, and I will tell you by what authority I do these things.
Mark 11:30 The baptism of John, was it from heaven, or of men? answer me.
Mark 11:31 And they reasoned with themselves, saying, If we shall say, From heaven; he will say, Why then did ye not believe him?
Mark 11:32 But if we shall say, Of men; they feared the people: for all men counted John, that he was a prophet indeed.
Mark 11:33 And they answered and said unto Jesus, We cannot tell. And Jesus answering saith unto them, Neither do I tell you by what authority I do these things.
They were outwitted and their little trap did not work. They were not of God's Spirit but full of self righteous pride.
Mat 23:28 Even so ye also outwardly appear righteous unto men, but within ye are full of hypocrisy and iniquity.
Luke 11:32 The men of Nineve shall rise up in the judgment with this generation, and shall condemn it: for they repented at the preaching of Jonas; and, behold, a greater than Jonas is here.