Whenever I read literature that deals with higher categories, there is a point of view that sheaves/stacks are generalised spaces. What does that mean?
For me, a space is a place to draw things. A CW complex or a simplicial set is an acceptable space for me. Since I accept a simplicial set as a space, I can imagine groupoids as spaces.
If a sheaf/stack is a generalised space, then how do I "specialise" a sheaf/stack to a topological space or a sSet? How do I draw stuff in a sheaf/stack?