Focused Link: A Clarification on the Meaning of "Conscience"

One such misconception that seems to never go away is the idea that conscience is the final arbiter of what is morally right — a misconception often designated under the expression “primacy of conscience”.

But to put it bluntly, conscience is not the final arbiter of what is morally right, nor has the Church ever taught that it is. In its truest sense, conscience is the intellectual apprehension of the Divine Law. For this reason, Divine Law is primary.

The full article: http://catholiceducation.org/articles/facts/fm0080.htm