There is only one thing that can form a bond between men, and that is gratitude...we cannot give someone else greater power over us than we have ourselves. Lettres Persanes (1721)
If I knew something useful to me and harmful to my family, I should put it out of my mind. If I knew something useful to my family and not to my country, I should try to forget it. If I knew something useful to my country and harmful to Europe, or useful to Europe and harmful to the human race, I should consider it a crime.