At 2 Corinthians 6:6, the Holy Spirit is listed with a number of qualities:
"...by purity, by knowledge, by long-suffering, by kindness, by holy spirit, by love free from hypocrisy" - NWT
It wouldn't make much sense for a person to be mentioned in this manner.
Also, in the Greek text of 2 Cor. 6:6, the word /definite article "the" does not occur. Yet many biased translations get creative in getting around that.
For more, see
What About Trinity "Proof Texts"?
Trinity Scripture Index
Search For Bible Truths - ARCHIVE
Search For Bible Truths - Search Guide