“人生七十古来稀”，我八十多了，人老总想后事。中国有句古话叫“盖棺定论”，我虽未“盖棺”也快了，总可以定论吧！我一生干了两件事：一是与蒋介石斗了那么几十年，把他赶到那么几个海岛上去了；抗战八年，把日本人请回老家去了。对这些事持异议的人不多，只有那么几个人，在我耳边叽叽喳喳，无非是让我及早收回那几个… - Mao Zedong

It is highly important to grasp this fact. It enables us to understand that revolutions and revolutionary wars are inevitable in class society and that without them, it is impossible to accomplish any leap in social development and to overthrow the reactionary ruling classes and therefore impossible for the people to win political power. Communists must expose the deceitful propaganda of the reactionaries, such as the assertion that social revolution is unnecessary and impossible. They must firmly uphold the Marxist-Leninist theory of social revolution and enable the people to understand that social revolution is not only entirely necessary but also entirely practicable, and that the whole history of mankind and the triumph of the Soviet Union have confirmed this scientific truth.

The world is yours, as well as ours, but in the last analysis, it is yours. You young people, full of vigour and vitality, are in the bloom of life, like the sun at eight or nine in the morning. Our hope is placed on you. The world belongs to you. China’s future belongs to you.

马克思主义的哲学认为，对立统一规律是宇宙的根本规律。这个规律，不论在自然界、人类社会和人们的思想中，都是普遍存在的。矛盾着的对立面又统一，又斗争，由此推动事物的运动和变化。矛盾是普遍存在的，不过按事物的性质不同，矛盾的性质也就不同。对于任何一个具体的事物说来，对立的统一是有条件的、暂时的、过渡的，因而是相对的，对立的斗争则是绝对的。