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All quotes by Mark Twain

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The man who is a pessimist before 48 knows too much; if he is an optimist after it, he knows too little.

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Biography

Nationality: American

Type: Author

Born: November 30th, 1835

Died: April 21st, 1910

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Quote By KeenBrain. Retrieved April 8, 2026, from

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American Psychological Association (APA):

Quote By Mark Twain KeenBrain. Retrieved April 8, 2026, from

/quotes/quote/m/mark_twain_130846">

Modern Language Association (MLA):

“Quote By Mark Twain” KeenBrain. n.d. Wed. 8 April. 2026 from

/quotes/quote/m/mark_twain_130846">

Chicago Manual Style (CMS):

“Quote By Mark Twain” KeenBrain. Accessed April 8, 2026.

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