“The Pharisees had heard that Jesus made and baptized more disciples than John (though Jesus Himself did not baptize, but His disciples)….” (John 4:1-2)
Baptism has bumfuzzled God’s people from the first.
Where did the practice originate? Answer: Evidently from the Old Testament practice of drenching a newly ordained priest (Leviticus 8:6). Later, some say, the “pouring” was given to proselytes coming into the Jewish faith from the world. So, when John the Baptist arrived and began calling people to wade into the Jordan for a dip (which is the literal meaning of “baptize”), while people thought he was strange, no one seems to have questioned the practice. Oddly, he was baptizing Jews, not Gentiles and not proselytes.
When our Lord was baptized, it signaled His coming out, His going public, His announcing to the world His identity. That moment, in my thinking, was the first time Satan knew beyond a doubt who the Messiah was. He knew the Lord was there somewhere, for he could read Scripture. But Jesus had done no miracles and singled Himself out in no way that would cause the enemy to identify Him. But Satan was on the alert. He listened to John preach and knew to be expecting the Christ. And then one day, Jesus of Nazareth walked into the water and the heavens opened and a voice from the sky shook the landscape.
And that’s when Satan knew.