(although Jesus himself didn't baptize, but his disciples),

 However that may be, this passage and the one before give us the unanswerable argument for Christ. The Samaritans believed in Jesus, not because of someone else's story but because they themselves had heard him speak things whose like they had never heard. The Galilaeans believed in him, not because someone had told them about him but because they had seen him do in Jerusalem things whose like they had never seen. The words he spoke and the deeds he did were arguments to which there was no answer. 