炸弹在未爆炸的时候，是矛盾物因一定条件共居于一个统一体中的时候。待至新的条件（发火）出现，才发生了爆炸。自然界中一切到了最后要采取外部冲突形式去解决旧矛盾产生新事物的现象，都有与此相仿佛的情形。 - Mao Zedong

People who try to commit suicide — don't attempt to save them! . . . China is such a populous nation, it is not as if we cannot do without a few people.

Marxist philosophy holds that the law of the unity of opposites is the fundamental law of the universe. This law operates universally, whether in the natural world, in human society, or in man's thinking. Between the opposites in a contradiction there is at once unity and struggle, and it is this that impels things to move and change. Contradictions exist everywhere, but they differ in accordance with the different nature of different things. In any given phenomenon or thing, the unity of opposites is conditional, temporary and transitory, and hence relative, whereas the struggle of opposites is absolute.

在我们的许多工作人员中间，现在滋长着一种不愿意和群众同甘苦，喜欢计较个人名利的危险倾向，这是很不好的。我们在增产节约运动中要求精简机关，下放干部，使相当大的一批干部回到生产中去，就是克服这种危险倾向的一个方法。要使全体干部和全体人民经常想到我国是一个社会主义的大国，但又是一个经济落后的穷国，这是一个很大的矛盾。要使我国富强起来，需要几十年艰苦奋斗的时间，其中包括执行厉行节约、反对浪费这样一个勤俭建国的方针。