"When we are tired, we are attacked by ideas we conquered long ago."

"What is great in man is that he is a bridge and not a goal."

"The man of knowledge must be able not only to love his enemies but also to hate his friends."

"There are no beautiful surfaces without a terrible depth."

"In heaven, all the interesting people are missing."

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

"Every deep thinker is more afraid of being understood than of being misunderstood."

"Amor Fati – Love Your Fate, which is in fact your life."

"There is always some madness in love. But there is also always some reason in madness."

"Is it better to out-monster the monster or to be quietly devoured?"

"The tree that would grow to heaven must send its roots to hell."

"Invisible threads are the strongest ties."

"You must be ready to burn yourself in your own flame; how could you rise anew if you have not first become ashes?"

"He who climbs upon the highest mountains laughs at all tragedies, real or imaginary."

"In every real man a child is hidden that wants to play."