Mao Zedong

党内不同思想的对立和斗争是经常发生的，这是社会的阶级矛盾和新旧事物的矛盾在党内的反映。党内如果没有矛盾和解决矛盾的思想斗争，党的生命也就停止了。

Opposition and struggle between ideas of different kinds constantly occur within the Party; this is a reflection within the Party of contradictions between classes and between the new and the old in society. If there were no contradictions in the Party and no ideological struggles to resolve them, the Party's life would come to an end. , 1937

茫茫九派流中国，沉沉一线穿南北。烟雨莽苍苍，龟蛇锁大江。黄鹤知何去？剩有游人处。把酒酹滔滔，心潮逐浪高！

Wide, wide flow the nine streams through the land,Dark, dark threads the line from south to north.Blurred in the thick haze of the misty rainTortoise and Snake hold the great river locked.The yellow crane is gone, who knows whither?Only this tower remains a haunt for visitors.I pledge my wine to the surging torrent,The tide of my heart swells with the waves. , 1927

独立寒秋，湘江北去，橘子洲头。看万山红遍，层林尽染；漫江碧透，百舸争流。鹰击长空，鱼翔浅底，万类霜天竞自由。怅寥廓，问苍茫大地，谁主沉浮？

Alone I stand in the autumn cold On the tip of Orange Island, Xiang flowing northward; I see a thousand hills crimsoned through By their serried woods deep-dyed, And a hundred barges vying Over crystal blue waters. Eagles cleave the air, Fish glide under the shallow water; Under freezing skies a million creatures contend in freedom. Brooding over this immensity, I ask, on this bondless land Who rules over man's destiny? , 1925

一切矛盾着的东西，互相联系着，不但在一定条件之下共处于一个统一体中，而且在一定条件之下互相转化，这就是矛盾的同一性的全部意义。列宁所谓“怎样成为同一的（怎样变成同一的），——在怎样的条件之下它们互相转化，成为同一的”，就是这个意思。

All contradictory things are interconnected; not only do they coexist in a single entity in given conditions, but in other given conditions, they also transform themselves into each other. This is the full meaning of the identity of opposites. This is what Lenin meant when he discussed "how they happen to be (how they become) identical--under what conditions they are identical, transforming themselves into one another". , 1937

通过实践而发现真理，又通过实践而证实真理和发展真理。从感性认识而能动地发展到理性认识，又从理性认识而能动地指导革命实践，改造主观世界和客观世界。实践、认识、再实践、再认识，这种形式，循环往复以至无穷，而实践和认识之每一循环的内容，都比较地进到了高一级的程度。这就是辩证唯物论的全部认识论，这就是辩证唯物论的知行统一观。

Discover the truth through practice, and again through practice verify and develop the truth. Start from perceptual knowledge and actively develop it into rational knowledge; then start from rational knowledge and actively guide revolutionary practice to change both the subjective and the objective world. Practice, knowledge, again practice, and again knowledge. This form repeats itself in endless cycles, and with each cycle the content of practice and knowledge rises to a higher level. Such is the whole of the dialectical-materialist theory of knowledge, and such is the dialectical-materialist theory of the unity of knowing and doing. , 1937