Every case is as different as the people to whom it happened. The important thing is not to stop questioning. A merely well-informed man is the most useless bore on God's Earth. Teach me and I remember. Good judgment comes from experience.
Success is never final.
In dialogue, people become observers of their own thinking. It's not what you don't know that hurts you, it's what you know that just ain't so. Don't find fault. Find a remedy. Honest differences are often a healthy sign of progress.