‘The internal sanction of duty, whatever our standard of duty may be, is one and the same – a feeling in our own mind; a pain, more or less intense, attendant on violation of duty, which in properly cultivated moral natures rises
Challenge: What if I do not have this feeling?
‘On such people morality of any kind has no hold but through external sanctions.’
Challenge: What if I have good reasons to think I won’t be caught?
Suggestion for Mill’s Answer: On such people morality of any kind has no hold.
Externalist: Moral beliefs do not by themselves have reason giving force.
Cognitivist: Moral statements can be true or false -- and some of them are true.
Realist/Naturalist: Moral statements, e.g. it is right to fi, are made true by empirical facts.