Deal always as though seen

Baltasar Gracian was a writer almost four centuries ago. Even though this was such a long time ago his writings can relate to our political transformations, economic battles, local interests against global forces, and new technologies torn between democratization and centralization.

I have learned a lot by reading The art of Worldly Wisdom. 

Here is one of my favorite passages:

Deal always as though seen. he is the seeing man, who sees that he is seen, or that he will be seen. He knows that the walls have ears, and that what is evil breaks its fetters to be free. Even when alone, he works as though the eyes of the world were upon him; because he knows that everything comes to be known; holding as witnesses today, those who will be such tomorrow because of what was discovered to them; unconcerned with what might be seen in his house from that of another, is only he who would have the whole world look in.