This is a great scene between the Pharisees and Jesus, interesting question by him too.
“Did John’s authority to baptize come from heaven or was it merely human?
I don’t know the answer to the question either, however from what I gather, it was to fulfill Gods purposes when Jesus and John were both together, with John stating “I need to be baptized by you.”
The water baptisms were for a material representation to the Jewish people that they needed to repent of their sins, mainly for disregarding God. That’s all it was, Jesus was to later baptize people with the Holy Spirit and fire after his death and resurrection.
While there is nothing wrong with being baptized today with water or sprinkling however you choose it doesn’t really show a change of heart, that truly has to come from within oneself in realization of looking to God and asking him to help you by the spirit which Jesus mentions later on in the recording of Luke 11:13.

“Did John’s authority to baptize come from heaven or was it merely human?
I don’t know the answer to the question either, however from what I gather, it was to fulfill Gods purposes when Jesus and John were both together, with John stating “I need to be baptized by you.”
The water baptisms were for a material representation to the Jewish people that they needed to repent of their sins, mainly for disregarding God. That’s all it was, Jesus was to later baptize people with the Holy Spirit and fire after his death and resurrection.
While there is nothing wrong with being baptized today with water or sprinkling however you choose it doesn’t really show a change of heart, that truly has to come from within oneself in realization of looking to God and asking him to help you by the spirit which Jesus mentions later on in the recording of Luke 11:13.
