知人者智，自知者明

zhīrénzhězhì,zìzhīzhěmíng
those who understand others are clever, but those who know themselves are truly wise (idiom, from Laozi's 道德經 Dàodéjīng

CEDICT

Entry Composition

1 知人 zhīrén
  1. (archaic) to be an insightful and astute judge of character
  2. to be an insightful and astute judge of character
2 者 zhě
  1. (after a verb or adjective) one who (is) ...
  2. (after a noun) person involved in ...
  3. -er
  4. -ist
  5. (used after a number or 後 hòu or 前 qián to refer to sth mentioned previously)
  6. (used after a term, to mark a pause before defining the term)
  7. (old) (used at the end of a command)
  8. (old) this
3 智 zhì (literary) wise; wisdom
4 自知 zìzhī
  1. to be personally aware
  2. to know thyself
5 者 zhě
  1. (after a verb or adjective) one who (is) ...
  2. (after a noun) person involved in ...
  3. -er
  4. -ist
  5. (used after a number or 後 hòu or 前 qián to refer to sth mentioned previously)
  6. (used after a term, to mark a pause before defining the term)
  7. (old) (used at the end of a command)
  8. (old) this
6 明 míng
  1. bright
  2. opposite: dark 暗 àn
  3. (of meaning) clear
  4. to understand
  5. next
  6. public or open
  7. wise
  8. generic term for a sacrifice to the gods