翻譯：既了解敵人，又了解自己，每次作戰(zhàn)都不會(huì)有危險(xiǎn)。
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.
The most important thing is to enjoy your life—to be happy—it's all that matters.
善于教導(dǎo)的人必須遇到善于學(xué)習(xí)的人，才能使教育的效果更大。
The more you sweat in peace, the less you bleed in war.