"Those men are wise who do not desire the unattainable, who do not love to mourn over what is lost, and are not overwhelmed by calamities."

"It is true that one should know the difference between good and evil, if one is to seek good and shun evil, but this knowledge should soak into every thought and influence every act in one’s life. Then indeed knowledge becomes virtue."

"Your own self is your best friend, and your own self is your worst enemy."