Full Idea
Shaftesbury argued that no morality could be founded in religious obedience, or piety. On the contrary, a man is motivated to such obedience only because conscience tells him that the divine being is worthy of it.
Gist of Idea
For Shaftesbury, we must already have a conscience to be motivated to religious obedience
Source
report of 3rd Earl of Shaftesbury (Inquiry Concerning Virtue or Merit [1699]) by Roger Scruton - Short History of Modern Philosophy Ch.8
Book Reference
Scruton,Roger: 'A Short History of Modern Philosophy' [ARK 1985], p.110
A Reaction
This seems to me a good argument. The only alternative is that we are brought to God by a conscience which was planted in us by God, but then how would you know you were being obedient to the right hypnotist?