Full Idea
According to Quine's conception of existence, the idea of a thing and the idea of existence are two sides of the same coin.
Gist of Idea
The idea of a thing and the idea of existence are two sides of the same coin
Source
report of Willard Quine (On What There Is [1948]) by Tim Crane - Elements of Mind 1.5
Book Reference
Crane,Tim: 'Elements of Mind' [OUP 2001], p.17
A Reaction
I suspect that Quine's ontology is too dependent on language, but this thought seems profoundly right