Friedrich Nietzsche said, "It is not a lack of love, but a lack of friendship that makes unhappy marriages."

Friedrich Wilhelm Nietzsche (October 15, 1844 – August 25, 1900) (German pronunciation: [ˈfʁiːdʁɪç ˈvɪlhəlm ˈniːtʃə]) was a nineteenth-century German philosopher and classical philologist. He wrote critical texts on religion, morality, contemporary culture, philosophy, and science, using a distinctive German language style and displaying a fondness for metaphor and aphorism.