Quote by Robert E. Lee
"The principle of duty is the only sure foundation for happiness."
More from Robert E. Lee
"Do your duty in all things. You cannot do more, you should never wish to do less."
"The education of a man is never completed until he dies."
"I have always observed that wherever you find the Confederate flag, you will see the most extreme form of racism."
"Duty is the most sublime word in our language."