大国总是在寻找机会以牺牲对手为代价来获取权力，这使它们天生具有侵略性。
The great powers are always searching for opportunities to gain power at the expense of their rivals, which makes them inherently aggressive.
翻译：贤明的君主和将领，之所以一出兵就可以战胜敌人，成就的功业超过一般人，是因为他们能事先探明敌情。事先探明敌情，不能使用占卜的手段获取，不可用类比的方法获取，也不可推验日月星辰运行来获取。一定要取之于人，取之于了解敌情的人。
与那些挑战你的人为伍，而不仅仅是那些赞同你的人。
The only way to understand a character is to understand their contradictions.