Full Idea
If we remove our own subject ...then all the constitution, all relations of objects in space and time, indeed space and time themselves would disappear, and as appearances they cannot exist in themselves, but only in us.
Gist of Idea
If we disappeared, then all relations of objects, and time and space themselves, disappear too
Source
Immanuel Kant (Critique of Pure Reason [1781], B059/A42)
Book Reference
Kant,Immanuel: 'Critique of Pure Reason', ed/tr. Guyer,P /Wood,A W [CUO 1998], p.168
A Reaction
Apart from over-cautious 'as appearances', this seems like simple Berkleyean idealism, and hence rather silly. The first commitment of realism (mine, anyway) is that at least time and space would survive our disappearance.