Full Idea
Assuming time to be infinitely divisible, the present can have no duration at all, for if it did, we could divide it into parts, and some parts would be earlier than others.
Gist of Idea
If time is infinitely divisible, then the present must be infinitely short
Source
Robin Le Poidevin (Travels in Four Dimensions [2003], 09 'in present')
Book Reference
Le Poidevin,Robin: 'Travels in Four Dimensions' [OUP 2003], p.156
A Reaction
I quite like Aristotle's view that things only have parts when you actually divide them. In modern physics fields don't seem to be infinitely divisible. It's a puzzle, though, innit?