The best time to plant a tree was twenty years ago. The second best time is now.
种一棵树最好的时间是二十年前,其次是现在。
翻译:过去善于打仗的将领,首先做到自己不被敌人战胜,再等待时机战胜敌人。不被敌人战胜取决于自己做好准备、不犯错,是否能战胜敌人取决于敌人是否犯错。
The true nobility is in being superior to your previous self.