2. If you want to know what other people think about somethingthat concerns you, you have only to reflecton what you would think of themunder the same circumstances. you schould regard no one as morally superior to you on this point, and no one as more simple. More often than we think, people notice things we believe we have artfully concealed from them. Of this remark, more than half is true, and that is saying a lot for a maxim composed in one’s thirtieth year. 

George Christoph Lichtenberg, the Waste Books

Translated by R.J. Hollingdale