合于利而动 (合於利而動) hé yú lì ér dòng

hé yú lì ér dòng phrase If it is to your advantage, make a forward move
Domain: Literary Chinese 文言文
Notes: Quote: from the Warring States period text 孫子兵法 “Art of War” by Sunzi, section 12 (Giles 1910, p. 158)