Although every man necessarily believes that every particular opinion which he holds is true (for to believe any opinion is not true, is the same thing as not to hold it); yet can no man be assured that all his own opinions, taken together, are true. Nay, every thinking man is assured they are not, seeing humanum est errare et nescire: “To be ignorant of many things, and to mistake in some, is the necessary condition of humanity.” This, therefore, he is sensible, is his own case. He knows, in the general, that he himself is mistaken; although in what particulars he mistakes, he does not, perhaps he cannot, know.

John Wesley (1703-1791) English cleric, Christian theologian and evangelist, founder of Methodism

Sermon #39, “Catholic Spirit,” I.4

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