Honesty, Error, and Truth

There are many good people in the world who are honestly mistaken, but when a man who is honestly mistaken hears the truth, one of two things must happen: he will cease to be mistaken or, he will cease to be honest. If he does not obey it, he will no longer be honest. If he does obey it, he will no longer be mistaken. Honesty and error must separate when truth comes along. No man can be honestly mistaken if he has heard the truth.

-- via collegevuechurch.com