Essentially, this is what Jesus did in the third chapter of Matthew.
“I baptise you with water for repentance,” said John the Baptist.
Then Jesus came from Galilee to John at the Jordan, to be baptised by him. John pulled back, “I need to be baptised by You, and yet You come to me?” Jesus replied, “Allow it for now, because this is the way for us to fulfill all righteousness.”
Then John allowed Jesus to be baptised.
What is repentance?
Proverbs says that, “As a man thinketh, so he is.” Basically, you are what you think. Because this is so, salvation must come first at the level of knowing, and work its way outwardly. That is repentance.
Repentance is changing your mind, in a corrective sense.