与yǔ友yǒu人rén书shū((节jié选xuǎn))
人rén之zhī为wéi学xué,不bù日rì进jìn则zé日rì退tuì。独dú学xué无wú友yǒu,则zé孤gū陋lòu而ér难nán成chéng。久jiǔ处chù一yī方fāng,则zé习xí染rǎn而ér不bù自zì觉jué。不bù幸xìng而ér在zài穷qióng僻pì之zhī域yù,无wú车chē马mǎ之zhī资zī,犹yóu当dāng博bó学xué审shěn问wèn,古gǔ人rén与yǔ稽jī,以yǐ求qiú其qí是shì非fēi之zhī所suǒ在zài,庶shù几jī可kě得dé十shí之zhī五wǔ六liù。若ruò既jì不bù出chū户hù,又yòu不bù读dú书shū,则zé是shì面miàn墙qiáng之zhī士shì,虽suī有yǒu子zi羔gāo、原yuán宪xiàn之zhī贤xián,终zhōng无wú济jì于yú天tiān下xià。子zǐ曰yuē:“十shí室shì之zhī邑yì,必bì有yǒu忠zhōng信xìn如rú丘qiū者zhě焉yān,不bù如rú丘qiū之zhī好hào学xué也yě。”夫fū以yǐ孔kǒng子zǐ之zhī圣shèng,犹yóu须xū好hào学xué,今jīn人rén可kě不bù勉miǎn乎hū?
清朝顾炎武