Adam Clarke on 1 Corinthians 12:13

For by one Spirit are we all baptized, etc. - As the body of man, though composed of many members, is informed and influenced by one soul; so the Church of Christ, which is his body, though composed of many members, is informed and influenced by one Spirit, the Holy Ghost; actuating and working by his spiritual body, as the human soul does in the body of man.

To drink into one Spirit - We are to understand being made partakers of the gifts and graces of the Holy Ghost agreeably to the words of our Lord, Joh 7:37, etc.: If any man thirst, let him come unto me and drink: this he spake of the Spirit which they that believed on him should receive.

On this verse there is a great profusion of various readings, which may be found in Griesbach, but cannot be conveniently noticed here.