2:18 {5} Then answered the Jews and said unto him, What {h} sign shewest thou unto us, seeing that thou doest these things?
(5) Against those who so bind God to an ordinary calling, which they themselves most shamefully abuse, that they will not admit of an extraordinary calling, which God confirms from heaven (and they would have it extinguished, although in vain) unless it is sealed with outward and bodily miracles.
(h) With what miracle do you confirm it, that we may see the heavenly power and strength which gives you authority to speak and to act in this manner?
2:18 What sign? The Jewish officials demand some sign that would demonstrate that he had authority over the temple.
2:18 Then answered the Jews - Either some of those whom he had just driven out, or their friends: What sign showest thou? - So they require a miracle, to confirm a miracle!
2:12-22 The first public work in which we find Christ engaged, was driving from the temple the traders whom the covetous priests and rulers encouraged to make a market-place of its courts. Those now make God's house a house of merchandise, whose minds are filled with cares about worldly business when attending religious exercises, or who perform Divine offices for love of gain. Christ, having thus cleansed the temple, gave a sign to those who demanded it, to prove his authority for so doing. He foretells his death by the Jews' malice, Destroy ye this temple; I will permit you to destroy it. He foretells his resurrection by his own power; In three days I will raise it up. Christ took again his own life. Men mistake by understanding that according to the letter, which the Scripture speaks by way of figure. When Jesus was risen from the dead, his disciples remembered he has said this. It helps much in understanding the Divine word, to observe the fulfilling of the Scriptures.