Full Idea
The totality of what exists, including what has existed and what will exist, is infinitely small in comparison with the totality of Objects of knowledge.
Gist of Idea
The objects of knowledge are far more numerous than objects which exist
Source
Alexius Meinong (The Theory of Objects [1904]), quoted by William Lycan - The Trouble with Possible Worlds 01
Book Reference
'The Possible and the Actual', ed/tr. Loux,Michael J. [Cornell 1979], p.276
A Reaction
This is rather profound, but the word 'object' doesn't help. I would say 'What we know concerns far more than what merely exists'.