Afterwards, men made use of the same word metaphorically, for the knowledge of their own secret facts, and secret thoughts; and therefore it is rhetorically said, that the conscience is a thousand witnesses. And last of all, men vehemently in love with their own new opinions, though never so absurd, and obstinately bent to maintain them, gave those their opinions also that reverenced name of conscience, as if they would have it seem unlawful to change or speak against them; and so pretend to know they are true, when they know at most, but that they think so.