Of those who find that the word 'church' always refers to an assembly, the plain rendering of these Passages may be understood as,
"
For by (The Superintending Administrative Governing of Another Comforter, The Third Person of The Triune Godhead, that is The Hol Spirit of God, Who is God)
one Spirit are we (the Saved souls, Jews and Gentiles, at Corinth [in context])
all (all Saved Souls in The New testament were Scripturally baptized and not just Jews, but Gentiles)
baptized (the 'one baptism' of Scripture, in water, as Entrance into membership)
into one body ( THE ONE ASSEMBLED CHURCH BODY, at CORINTH). , . . ."
Later, in context, the gist of the Passage is that there is no reason for Jews and Gentiles to not be water baptized and assemble together because they are both Born of the Same Spirt. That reference is to Salvation.
Being Led by The Holy Spirit to be Faithful to God's Command to be water baptized is what,
"For by one Spirit are we all (Saved Corinthians are/were LED to be)
baptized (in water)
into one (local)
body (at Corinth), . . ."
...
For John truly baptized with water; but ye shall be baptized with the Holy Ghost, by Jesus Christ, Who is said, by John, to refer to The Day of Pentecost, when Jesus Baptized HIS CHURCH ORGANIZATION, assembled there, WITH THE HOLY SPIRIT, to Anoint her, until The End of Time. . . .
Some of those listening to John were to be Saved and baptized by water into the church at Jerusalem that would later be figuratively baptized and immersed, with The Holy Spirit, BY JESUS.
The Holy Spirit has never baptized a thing.
...
Well, by not seeing the local church as being the only kind of church Jesus Organizes, under the Leadership of The Holy Spirit, Satan invented "Holy Spirit baptism"(?), in default, as well as, "one body"(?), as if that is something that is in The Bible and IT IS NOT.
And he influences some folks to carry on with those lies.
They are heresy and the denial of The Lord's churches that He Founded and Promised to be with and another gospel, which is accursed, by mixing Salvation, with something counterfeit, 100%, which is "Spirit Baptism". IT IS NOT IN THERE.
N

NE HAS EVER FOUND EITHER OF THEM, in The Bible or on Earth.
...
Any time the generic sense of a word has an article 'the', for example, in front of it, the word becomes plural when the article is dropped.
"The church" = "churches" every time.
Rosco Brong Sermon, Baptist Perpetuity
#10 of 10: PILLAR AND GROUND
"These things write I unto thee, hoping to come unto thee shortly:
but if I tarry long, that thou mayest know
how thou oughtest to behave thyself in the house of God,
which is the church of the living God,
the pillar and ground of the truth" [1 Timothy 3:15].
Speaking of the church
(es) as an organized assembly, as the context clearly shows,
Paul here calls it
"the pillar and ground of the truth."
That is, the church
(es) not only, as a pillar or column, upholds the truth, but it is the foundational support of the truth.
Here we have the explanation
for the wholesale loss of Bible truth by false churches
and unattached Christians.
It has pleased God that His churches
should be the pillar and ground of the truth,
and so it has been through the centuries.