In the following chapter I have not entered into any particular consideration of the case in which the individual's conscience is definitely in conflict with the general moral consciousness of his age and country: because, though it is commonly held to be a man's duty always to obey the dictates of his own conscience, even at the risk of error, it can hardly be said to be a current opinion that he will always attain the greatest happiness open to him by conforming to the dictates of his conscience even when it conflicts with received morality.

ME Book 2 Chapter 4 Section 3