知彼知己 zhī bǐ zhī jǐ

DEFINITIONS

  1. to know the enemy and know oneself (idiom, from Sunzi's "The Art of War")

CHARACTERS

知 zhī know, perceive, comprehend
彼 bǐ that, there, those
知 zhī know, perceive, comprehend
己 jǐ self, oneself; personal, private; 6th heavenly stem