Which all by itself proves the existence of God!
Here is a commentary by St. Ambrose:
"Both Apostles and Prophets received that One Spirit,
as the vessel of election.
The doctor of the Gentiles, says:
'For also in One Spirit were we all Baptized into One Body...
And were all given to drink into One Spirit';
Him, as it were, Who cannot be divided,
but is poured into souls,
and flows into the senses,
that He may quench the burning of this world's thirst."
This is, I believe, a better translation of the passive of the aorist "epotisthimen" than my "have been watered", rending it much more properly: "Have been given to drink" into One Spirit... [God bless Greek usage!]... Which makes the meaning much more clear, for we eat the Body of our Lord, and drink His Blood... So that referring to the Eucharist seems fairly straight-forward...
We are baptized INTO One Spirit, but nowhere does it say, as your quoted comentary drifts, BY One spirit...
John the Baptist reported that Christ will come and Baptize, and Scripture confirms that He did Baptize...
And it also confirms that His Disciples were the ones actually DOING the Baptizing...
This confirms that when His Disciples are Baptizing, it is Christ Baptizing...
And it also lays the groundwork for His Commanding His Apostles alone...
To be Baptizing ALL the Nations [INTO Christ]...
For by this, it is STILL Christ, not mere men, DOING the Baptizing into Himself...
Arsenios