The greater part of the world's troubles are due to questions of grammar. Essays
I must have a prodigious quantity of mind; it takes me as much as a week sometimes to make it up. The Innocents Abroad
Shun no toil to make yourself remarkable by some talent or other; yet do not devote yourself to one branch exclusively; strive to get clear notions about all; give up no science entirely, for science is but one. Day's Collacon
Food production was indirectly a prerequisite for the development of guns, germs, and steel. Hence geographic variation in whether, or when, the peoples of different continents became farmers and herders explains to a large extent their subsequent contrasting fates. Guns, Germs And Steel
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