That which is, is ...it cannot be more or less. There is... as much of it in one place as in another... a continuous, indivisible plenum. From this it follows... that it must be immovable... [for] it must move into an empty space, and there is no empty space. ...For the same reason, it must be finite, and can have nothing beyond it. It is complete in itself, and has no need to stretch out indefinitely into an empty space that does not exist. ...It is equally real in every direction ...the ...the only form ...Any other would ...[have distinguishable] direction... [T]his sphere cannot ...move round its ...axis; for there is nothing outside ...[to] reference...