Full Idea
When we are discussing actions, although general statements have a wider application, particular statements are closer to the truth. This is because actions are concerned with particular facts, and theories must be brought into harmony with these.
Gist of Idea
Actions concern particular cases, and rules must fit the cases, not the other way round
Source
Aristotle (Nicomachean Ethics [c.334 BCE], 1107a29)
Book Reference
Aristotle: 'Ethics (Nicomachean)', ed/tr. ThomsonJ A K/TredennickH [Penguin 1976], p.103
A Reaction
This implies criticism of Kant's whole theory, suggesting that there cannot be a universal law for most given situations. I take Aristotle's view to be (in modern terms) that a key virtue is sensitivity, taken as acute awareness of detail in a situation.