Full Idea
We see movement everywhere, but if there were no empty space, things would be denied the power of movement - or rather, they could not possibly have come into existence, embedded as they would have been in motionless matter.
Gist of Idea
If there were no space there could be no movement, or even creation
Source
Lucretius (On the Nature of the Universe [c.60 BCE], I.342)
Book Reference
Lucretius: 'On the Nature of the Universe', ed/tr. Latham,Ronald [Penguin 1951], p.37
A Reaction
This still seems a good argument, if reality is made of particles. People can move in a crowd until it becomes too dense.