That we may give an answer to them that sent us - These Pharisees were probably a deputation from the grand Sanhedrin; the members of which, hearing of the success of the Baptist's preaching, were puzzled to know what to make of him, and seriously desired to hear from himself what he professed to be.

Then said they unto him, who art thou?.... Since, as yet, he had only answered in negatives, who he was not, that he was not the Christ, nor Elias, nor that prophet; they desire he would give them a positive account who he was:

that we may give answer to them that sent us; that their labour might not be in vain; that they might not come so far for nothing, without knowing who he was; and that they might be capable of giving an account of him to the sanhedrim:

what sayest thou of thyself? they insisted on it, that he would openly, and honestly declare who he was, and what was his office and business; that from his own mouth, and not from the opinion and conjectures of others, they might represent him in a true light to those who had deputed them on this errand.

Then said they unto him, Who art thou? that we may give an answer to them that sent us. What sayest thou of thyself?

1:22,23 Who art thou? When the priests and Levites insisted that John should declare who he was, he quoted Isaiah, and said he was

The voice of one crying in the wilderness. See Isa 40:3. See PNT Mt 3:3. His work was preparation for the Lord.

1:19-28 John disowns himself to be the Christ, who was now expected and waited for. He came in the spirit and power of Elias, but he was not the person of Elias. John was not that Prophet whom Moses said the Lord would raise up to them of their brethren, like unto him. He was not such a prophet as they expected, who would rescue them from the Romans. He gave such an account of himself, as might excite and awaken them to hearken to him. He baptized the people with water as a profession of repentance, and as an outward sign of the spiritual blessings to be conferred on them by the Messiah, who was in the midst of them, though they knew him not, and to whom he was unworthy to render the meanest service.