Charles Ellicott Commentary Psalms 94:11

"Jehovah knoweth the thoughts of man, That they are vanity." — Psalms 94:11 (ASV)

That they are vanity —The literal rendering, “for they are breath,” referring not to thoughts, but to man collectively, gives equally good sense, and would, despite the order of the words, be natural, since the masculine pronoun is used. But the Septuagint stands as the Authorised Version, and is so quoted by St. Paul (1 Corinthians 3:20), with the substitution of wise men for men.