People Are Watching
Not to get all creepy or anything, but it is important to always act your best cause you never know when other people are watching you.
In fact, most of the people in the building across the street are completely unaware that once they draw their shades down, I can still peer into their windows while I sit at my dining table. Sometimes they put on quite a show!
In business, we need to always be aware that people are watching and paying attention to words we might utter under our breath, complaints we might voice about customers or private conversations we might have on our phone while sitting in a coffee shop or in a public place, even if we think no one is watching or listening, because someone always is.