Full Idea
Of quantities, some are discrete, others continuous. ...Discrete are number and language; continuous are lines, surfaces, bodies, and also, besides these, time and place.
Gist of Idea
Some quantities are discrete, like number, and others continuous, like lines, time and space
Source
Aristotle (Categories [c.331 BCE], 04b20)
Book Reference
Aristotle: 'Categories and De Interpretatione', ed/tr. Ackrill,J.R. [OUP 1963], p.12
A Reaction
This distinction seems to me to be extremely illuminating, when comparing natural numbers with real numbers, and it is the foundation of the Greek view of mathematics.