Generals Must Know the Terrain-Sun Zi
From World's Chinese Wiki
Generals Must Know the Terrain by Sun Zi
English: Thus, he who is adept at warfare, when deploying his troops for battle, is never confused or misguided. When he mounts a military campaign, he never runs out of strategies or plans. Thus it is said: Know the enemy, know yourself, your victory will not be threatened. Know the weather, know the terrain, and your victories will be limitless.
Modern: 所以真正懂得用兵的人，行动起来目的明确而不迷惑，采取措施或谋略变化无穷而不呆板；所以，了解敌人，了解自己，争取胜利不会有危险；懂得天时，懂得地利，胜利可保全。
Original: 故知兵者，动而不迷，举而不穷。故曰：知彼知已，胜乃不殆；知天知地，胜乃可全。
Business Application:
From: Sun Zi Art of War Chapter 10