Every thing is, as it were, in a space of possible atomic facts. I can think of this space as empty, but not of the thing without the space.
A spatial object must lie in infinite space. (A point in space is an argument place.)
A speck in a visual field need not be red, but it must have a colour; it has, so to speak, a colour space round it. A tone must have a pitch, the object of the sense of touch a hardness, etc.
Objects contain the possibility of all states of affairs.
The possibility of its occurrence in atomic facts is the form of the object.
The object is simple.