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“Beauty is truth, truth beauty”
The compressed closing formula binds beauty and truth inside the ode’s meditation on art, inviting interpretation rather than offering a settled philosophical definition.
Source note: “Ode on a Grecian Urn,” in Keats: Poems Published in 1820; Project Gutenberg #23684. The words are presented as the urn’s closing message, so the source page preserves the dramatic-poetic framing.
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“Public opinion—private laziness.”
The epigram provocatively suggests that adopting public opinion can sometimes substitute borrowed judgment for the harder work of forming one’s own view.
Source note: Human, All-Too-Human, Part I, aphorism 482, “Repeated Once More”; Helen Zimmern translation.
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“You and I are but sewing-machines.”
Voice: Dialogue speaker · Old Man
The comic comparison reduces human pride by placing ordinary people beside the much richer creative machinery Twain has just attributed to Shakespeare.
Source note: What Is Man?, Old Man speaking after comparing Shakespeare with a Gobelin loom; the machine metaphor is part of the essay’s comic-philosophical dialogue.
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“A thing of beauty is a joy for ever.”
Keats opens the poem by claiming that beauty can continue to give delight beyond the instant in which it is first encountered.
Source note: Endymion, Book I, opening line; Project Gutenberg #24280. This is a poetic proposition within a Romantic work, not an empirical rule that every aesthetic experience remains pleasurable forever.
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“Without music life would be a mistake.”
The compact declaration gives music an essential place in Nietzsche’s picture of a life worth affirming, expressing aesthetic valuation rather than a measurable claim that music is necessary for every person’s health or happiness.
Source note: The Twilight of the Idols, “Maxims and Missiles,” maxim 33, Anthony M. Ludovici translation, Project Gutenberg #52263. The maxim begins comically with the sound of a bagpipe before arriving at this sentence.
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“What is now proved was once only imagined.”
Blake’s proverb compresses a recurring imaginative pattern: possibilities can exist first as conceived ideas before later work, discovery or demonstration makes some of them real or provable.
Source note: The Marriage of Heaven and Hell, “Proverbs of Hell,” represented by Project Gutenberg #45315 at printed page 16. Gutenberg regularizes the line to “imagined”; Blake’s engraved text is often transcribed with historical spelling and punctuation. The proverb is part of Blake’s deliberately paradoxical infernal-wisdom sequence, not a literal claim that every imagined thing will eventually be proved.