敵を知り己を知らば百戦危うからず
てきをしりおのをしらばひゃくせんあやうからず
know your enemy, know thyself, and you shall not fear a hundred battles
彼を知り己を知れば百戦殆からず is read as かれをしりおのれをしればひゃくせんあやうからず (kare o shirionore o shirebahyakusenayaukarazu) and means if you know your enemy and know yourself, in a hundred battles you will never be defeated.
かれをしりおのれをしればひゃくせんあやうからず
kare o shirionore o shirebahyakusenayaukarazu
てきをしりおのをしらばひゃくせんあやうからず
know your enemy, know thyself, and you shall not fear a hundred battles
てきをしりおのをしればひゃくせんあやうからず
know your enemy, know thyself, and you shall not fear a hundred battles