Full Idea
The incompleteness of set theory contrasts sharply with the completeness of elementary logic.
Gist of Idea
Unlike elementary logic, set theory is not complete
Source
Alex Orenstein (W.V. Quine [2002], Ch.5)
Book Reference
Orenstein,Alex: 'W.V. Quine' [Princeton 2002], p.99
A Reaction
This seems to be Quine's reason for abandoning the Frege-Russell logicist programme (quite apart from the problems raised by Gödel.