On the discussion on baptism:
Prophet John was sent by God to prepare the way of the Lord. He was sent ahead of Christ to give knowledge of salvation to God's people, by the remission of their sins.
Mt.3:3
3 For this is he who was spoken of by the prophet Isaiah, saying:
“The voice of one crying in the wilderness:
‘Prepare the way of the Lord;
Make His paths straight.’ ”
His father Zacharias was filled with the Holy Spirit, and prophesied, saying:
Luke 2:76-77
............
76 “And you, child, will be called the prophet of the Highest;
For you will go before the face of the Lord to prepare His ways,
77 To give knowledge of salvation to His people
By the remission of their sins,
For what John was sent for, he came baptizing in the wilderness and preaching a baptism of repentance for the remission of sins.
Mark 1:2-4
2 As it is written in the Prophets:
“Behold, I send My messenger before Your face,
Who will prepare Your way before You.”
3 “The voice of one crying in the wilderness:
‘Prepare the way of the Lord;
Make His paths straight.’ ”
4 John came baptizing in the wilderness and preaching a baptism of repentance for the remission of sins.
John came baptizing. And for what is the baptism for? It serves as the preparation by which he was sent to do. How is that? Baptism, as God's people sees and understand it, is a purification matter, a cleansing. This only would imply that John was asking God's people, to make purification of themselves, in preparation of the coming of the Lord, the Messiah. And that is by repentance. So, John came baptizing, preaching a baptism of repentance.
Matthew 3:1-2
1 In those days John the Baptist came preaching in the wilderness of Judea, 2 and saying, “Repent, for the kingdom of heaven is at hand!”
When people repent, they go to John to be baptized. We know, their baptism was with water, as it was with water that John baptized. And this water did not wash away their sins, nor did it cause the remission of their sins. But one thing is sure, to them who were baptized, it prepared them for the coming of the Messiah, having been purified by the water of baptism, as was their understanding of their Jewish custom of washing with water. And indeed they have purified themselves, and that by their repentance and unto the Messiah, who is the Lord.
Mark 1:8 I indeed baptized you with water, but He will baptize you with the Holy Spirit.”
So John did not fail to tell them concerning this, saying that they shall be baptized, yet again so to speak. And that, not by him but by the Messiah. And that not with water, but with the Holy Spirit.
This baptism with the Holy Spirit is unlike that with water. For water may cleanse the outer part of man, but the Holy Spirit cleanses the inner where sin is said to be. It is the HS that cleanses away the sins of the man. This cleansing is what is the baptism with the HS, which the Lord Jesus Christ performs upon the person, who truly repents, whose inner sincerity may well be outwardly expressed in his undergoing the baptism with water.
Now anybody, even the not truthfully repentant ones, can have themselves be baptized with water. Obviously, even while they are baptized with water, it does not follow that they had been baptized with the HS by the Lord Jesus Christ. In as much as that could be, it could be in like sense, that a sincerely repentant one is baptized with the HS by Christ, even while he has not been baptized with water. Though, in this latter case, he will cause himself to be baptized with water, in obedience to the instructions of the Lord.