Mark 11:30
John's baptism — was it from heaven, or of human origin? Tell me — the John question is the perfect trap reversal. John's authority was either from heaven (divine) or from human origin (not divine). The answer to John's authority question is the same as the answer to Jesus' authority question — the same divine source, the same prophetic commission. The question also carries its own implication: if John's baptism was from heaven, then John's testimony about Jesus (Mark 1:7–8) settles the authority question.