Another doctrine repugnant to Civill Society, is that whatsoever a man does against his Conscience, is Sinne; and it dependeth on the presumption of making himself judge of Good and Evill. For a man's Conscience and his Judgement are the same thing, and as the Judgement, so also the Conscience may be erroneous.

The Second Part, Chapter 29, p. 168. - Leviathan (1651)