What you notice about a sinner? You better believe they notice about you. What you ask a simple person? You better believe they tell everyone. It's human nature at work.
You most likely can test a person honesty. By tellng them crooked things to see the things they say. If they state if they found a bag of money and would keep it. Then they you truly don't want to know. But, it's human nature following the flesh.
Where we are very aware of our soul? That if we look at ourselves in the mirror we won't like the reflection. But, this is human nature. From it we seek protection.