We are as hosts at home awaiting the arrival of our weary visitors. This will give us victory in every battle.

以逸待劳,以主制客, 此乃百战百胜之势.

《现代汉英综合大词典》

To be victorious, only the joint use of multiple conditions.

要做到百战百胜, 只有多重条件的联合使用.

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Business is like a war, you must understand your enemy to win the war.

做生意就向打仗一样, 只有知己知彼方可百战百胜.

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Know the mutant ; kill the mutant.

知己知彼, 百战百胜.

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