Full Idea
A scientific subject will possess more accuracy (i.e. simplicity) the more that it is about conceptually prior and simpler things, and so it will be more accurate without than with magnitude being involved, and above all being without movement.
Gist of Idea
Science is more accurate when it is prior and simpler, especially without magnitude or movement
Source
Aristotle (Metaphysics [c.324 BCE], 1078a10)
Book Reference
Aristotle: 'Metaphysics', ed/tr. Lawson-Tancred,Hugh [Penguin 1998], p.399
A Reaction
Aristotle is especially concerned to show how we can achieve accuracy, even while abstracting away from the details of the objects we are studying. Frege should have studied Aristotle more closely.