Because people don’t see themselves, they can commit all sorts of bad deeds. They don’t look at their own minds.
When people are going to do something bad, they have to look around first to see if anyone is looking: “Will my mother see me?” “Will my husband see me?” “Will my children see me?” “Will my wife see me?”
If there’s no one watching, then they go right ahead and do it. This is insulting themselves.
They say no one is watching, so they quickly finish their bad deed before anyone will see. And what about themselves? Aren’t they a “somebody” watching?
– Ajahn Chah