Full Idea
Only those objects exist which have to particular parts of space and time the special relation of 'occupying' them.
Gist of Idea
Objects only exist if they 'occupy' space and time
Source
Bertrand Russell (Meinong on Complexes and Assumptions [1904], p.29)
Book Reference
Russell,Bertrand: 'Essays in Analysis', ed/tr. Lackey,Douglas [George Braziller 1973], p.29
A Reaction
He excepts space and time themselves. Clearly this doesn't advance our understanding much, but it points to a priority in our normal conceptual scheme. Is Russell assuming absolute space and time?