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，… - Mao Zedong

If a man wants to succeed in his work, that is, to achieve the anticipated results, he must bring his ideas into correspondence with the laws of the objective external world; if they do not correspond, he will fail in his practice. After he fails, he draws his lessons, corrects his ideas to make them correspond to the laws of the external world, and can thus turn failure into success; this is what is meant by "failure is the mother of success" and "a fall into the pit, a gain in your wit".

In approaching a problem a Marxist should see the whole as well as the parts. A frog in a well says, "The sky is no bigger than the mouth of the well." That is untrue, for the sky is not just the size of the mouth of the well. If it said, "A part of the sky is the size of the mouth of a well", that would be true, for it tallies with the facts. What we say is that in one respect the Red Army has failed (i.e., failed to maintain its original positions), but in another respect it has won a victory (i.e., in executing the plan of the Long March). In one respect the enemy won a victory (i.e., in occupying our original positions), but in another respect he has failed (i.e., failed to execute his plan of “encirclement ant suppression” and of “pursuit and suppression”). That is the only appropriate formulation, for we have completed the Long March.

We, the communists, do not want official positions; we want revolution. We must have a thoroughly revolutionary spirit and must be with the masses every hour, every minute. As long as we are with the masses, we shall always be victorious.