his whole ministry and authority [cf. John 1:33; Mald, etc.]; “whence was it” is a question intimately connected with the questions asked of Jesus: if John’s baptism was of God, then the authority of Jesus too is of God [cf. Mt. 3:2]. “They thought within themselves,” or they debated with one another; if there were question of their secret thoughts, the evangelist could not have known them without a special revelation. “Why then did you not believe him” does not merely mean, “Why were you not baptized
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