The survival lines
“What does not kill me makes me stronger.” Twilight of the Idols (1888), Maxims and Arrows 8. Worth knowing: he wrote it as a personal war-cry (“from the military school of life”), not a general law of trauma; he of all people knew suffering can simply damage. “He who has a why to live for can bear almost any how.” Same book, Maxims 12, and the line Viktor Frankl carried through the camps into Man's Search for Meaning; the 'almost' is Nietzsche's honesty.
The famous ones, in context
“God is dead.” The Gay Science (1882), sections 108 and 125. The posters read it as a victory chant; the text is closer to a crime scene. The madman who announces it is horrified: Europe has quietly stopped believing and hasn't noticed that its morality, meaning, and institutions were plugged into that socket. The line diagnoses a crisis, and the rest of Nietzsche's work is his attempt to answer it. “If you gaze long into an abyss, the abyss also gazes into you.” Beyond Good and Evil (1886), section 146, paired with the warning about fighting monsters without becoming one; it's advice for prosecutors, moderators, and anyone who stares at darkness professionally.
The life-affirming ones
“Without music, life would be a mistake.” Twilight of the Idols, Maxims 33, from philosophy's most musical author. “Become who you are.” The Gay Science 270 (borrowed from the poet Pindar), the seed of his whole self-creation ethic. Amor fati, loving your fate outright, is his formula for greatness from Ecce Homo; we gave it a full page, because it earned one and the tattoo traffic agrees.
The fake, and where he lives
“And those who were seen dancing were thought to be insane by those who could not hear the music.” Gorgeous, everywhere, and in no Nietzsche text; quote researchers have searched his corpus and found nothing, and the line drifts between his name and several others. File it beside the Lao Tzu fakes: calm profundity attracts famous names. The real Nietzsche, stranger and funnier than his posters, gets his pages among the 130 thinkers in 365 Days of Philosophy (★4.5 across 253 Amazon ratings), and the existentialism guide maps his neighborhood free.
Common questions
What is Nietzsche's most famous quote?
'What does not kill me makes me stronger' (Twilight of the Idols, Maxims 8), with 'God is dead' (The Gay Science 108, 125) as the most famous and most misread: in the text it's a crisis diagnosis delivered by a horrified madman, not a celebration.
Did Nietzsche say 'those who were seen dancing were thought insane by those who could not hear the music'?
No; it appears nowhere in his works, and researchers class it as a modern orphan quote that attached to his name. It's the Nietzsche equivalent of the fake calm quotes that attach to Lao Tzu and Buddha.
What did Nietzsche mean by God is dead?
That European civilization had stopped genuinely believing, without noticing that its morality and meaning were built on that belief; the announcement is a warning about the crater, not a victory lap. His later work tries to answer what humans do next.
Was Nietzsche a nihilist?
The opposite by intent: he diagnosed nihilism as the coming disease and spent his career prescribing against it (self-creation, amor fati, saying yes to life). He's routinely shelved with what he was fighting.