"I’m a philosophy professor.""If you could give one piece...

"I’m a philosophy professor."
"If you could give one piece of advice to a large group of people, what would it be?"
"Never make an exception of yourself."
"What does that mean?"
"People like to make exceptions of themselves. They hold other people to moral codes that they aren’t willing to follow themselves. For example, people tend to think that if they tell a lie, it’s because it was absolutely necessary. But if someone else tells a lie, it means they’re dishonest. So never make an exception of yourself. If you’re a thief, don’t complain about being robbed.”