The Art of War by active 6th century B.C. Sunzi

21. The clever combatant looks to the effect of combined energy, and

Chapter 153 59 words
does not require too much from individuals. [Tu Mu says: "He first of all considers the power of his army in the bulk; afterwards he takes individual talent into account, and uses each men according to his capabilities. He does not demand perfection from the untalented."] Hence his ability to pick out the right men and utilise combined energy.